Cook Islands Meteorological Service

Northern and Southern Cooks
Weather Bulletin issued from CIMS on Mon 01st June at

Situation:
A southeast wind flow prevails over Southern Cooks.

A weak trough of low pressure affects Northern Cooks.

Forecast to midnight tonight for the Southern Cooks:
Cloudy periods with brief showers.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.
Moderate southerly swells.

Further outlook: Cloudy periods with brief showers.

For Rarotonga:
Cloudy periods with brief showers.
Further outlook: Cloudy periods with brief showers.

For the Northern Cooks:
Cloudy periods with some showers and isolated thunderstorms.
Moderate to fresh easterly winds.
Moderate to rough seas.

Further outlook: Cloudy periods with some showers and isolated
thunderstorms.

Moon Phase: (Arapo)
Rakau Tai

Tides:
High Tide - 10:19am
Low Tide - 04:54pm (later)
High Tide - 11:02pm (tonight)
Low Tide - 04:54am (tomorrow)

Weather Bulletin issued from CIMS Jun 31st 06:15pm.

Situation:
A southeast wind flow prevails over Southern Cooks.

A weak trough of low pressure affects Northern Cooks.

Forecast to midnight tomorrow for the Southern Cooks:
Cloudy periods with brief showers.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.
Moderate southerly swells.

Further outlook:
Cloudy periods with brief showers.

For Rarotonga:
Cloudy periods with brief showers.

Further outlook:
Cloudy periods with brief showers.

For the Northern Cooks:
Cloudy periods with some showers and isolated thunderstorms.
Moderate to fresh easterly winds.
Moderate to rough seas.

Further outlook:
Cloudy periods with some showers and isolated
thunderstorms.

Tide & Moon Phases (Arapo)

Low Tide - 04:15pm
High Tide - 10:23pm
Low Tide - 04:16am Tomorrow
High Tide - 10:19am Tomorrow

Po Turu

Northern and Southern Cooks
Weather Bulletin issued from CIMS Nikao - Rarotonga
Sunday 31st May 2026 at 06:00am CILT.
A DAMAGING HEAVY SWELL WARNING REMAINS IN FORCE FOR OPEN WATERS OF SOUTHERN COOKS.

A COASTAL INUNDATION ALERT REMAINS IN FORCE FOR SOUTHERN COOK COASTAL AREAS.

Situation:
A low pressure system to the far south of Southern Cooks generates and directs damaging southerly swells over Southern Cooks. Meanwhile, a southeast wind flow prevails over Southern Cooks.

A moist easterly wind flow prevails over Northern Cooks. Meanwhile, a weak trough of low pressure affects the group.

Forecast to midnight tonight for the Southern Cooks:
Cloudy periods with brief showers.
Expect damaging heavy swells with heights up to 4.0m over open waters with risk of coastal inundation during high tides.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.

Further outlook: Cloudy periods with brief showers. Expect
damaging heavy swells with heights up to 4.0m over open waters with risk of coastal inundation during high tides. Strong southeasterly winds developing.

For Rarotonga:
Cloudy periods with brief showers.
Expect damaging heavy swells with heights up to 4.0m over open waters with risk of coastal inundation during high tides.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.

Further outlook: Cloudy periods with brief showers. Expect
damaging heavy swells with heights up to 4.0m over open waters with risk of coastal inundation during high tides. Strong southeasterly winds developing.

For the Northern Cooks:
Cloudy periods with brief showers.
Moderate to fresh easterly winds.
Moderate to rough seas.

Further outlook: Cloudy periods with brief showers.

Moon Phase (ARAPO) & Tides
Day after Full Moon (TURU)

High: 09:45am and 10:25pm
Low: 03:35am and 04:15pm

Northern and Southern Cooks
Weather Bulletin issued from NWFC Nadi May 300120 UTC.
A DAMAGING HEAVY SWELL WARNING REMAINS IN FORCE FOR OPEN WATERS OF SOUTHERN COOKS.

A COASTAL INUNDATION ALERT REMAINS IN FORCE FOR SOUTHERN COOK COASTAL AREAS.

Situation:
A low pressure system to the far south of Southern Cooks generates and directs damaging southerly swells over Southern Cooks. Meanwhile, a southeast wind flow prevails over Southern Cooks.

A moist easterly wind flow prevails over Northern Cooks. Meanwhile, a weak trough of low pressure remains slow moving over the southwestern part of the group.

Forecast to midnight tomorrow for the Southern Cooks:
Cloudy periods with brief showers.
Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.

Further outlook: Cloudy periods with brief showers. Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides. Swells abating later in the day. Strong southeasterly winds developing.

For Rarotonga:
Cloudy periods with brief showers.
Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.

Further outlook: Cloudy periods with brief showers. Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides. Swells abating later in the day. Strong southeasterly winds developing.

For the Northern Cooks:
Cloudy periods with some showers over the southwestern parts.
Elsewhere, fine apart from brief showers.
Moderate to fresh easterly winds.
Moderate to rough seas.

Further outlook: Cloudy periods with some showers and isolated thunderstorms over the southwestern parts. Elsewhere, fine apart from brief showers.

Moon Phase (ARAPO) & Tides
Night before Full Moon (OTU)

High: 09:00pm and 09:05am
Low: 02:55pm and 02:55am

🌊😭 GOOD MORNING COOK ISLANDS, the sea has been angry since Monday and honestly? at this point the sea needs therapy, not attention 💅🌊

Leettttsss gooo!

Southern Cooks remain under a Heavy Swell Warning with big 3 metre swells smashing through open waters and coastal flooding still possible during high tide. The ocean today is STILL outside throwing tantrums like somebody took away its WiFi😭

Rarotonga forecast:
☁️ Cloudy periods
🌦️ Brief showers
💨 Winds strong enough to rearrange your entire bloodline

If you spent time doing your hair this morning…
mmm. That was very optimistic of you 😂💀

Outside the reef is rough as today.
Not “little splash splash” rough.
More like:
🚤 “Maybe the boat stays home today chief.”
🌊 “Maybe don’t test the ocean’s attitude problem.”

Meanwhile up north, some islands are enjoying sunshine ☀️ while others getting showers and possible thunderstorms ⚡ because the weather apparently using spin-the-wheel settings today.

Friday reminders:
👕 Bring the washing in before the Pacific claims it
📸 Stop risking your life for aesthetic wave videos 😭
☕ Perfect weather for hot tea and gossip

Stay safe family 💙

Because right now the ocean giving:
“if I go down…” 🌊
“…EVERYBODY going down with me.” 😭💀

Ka kite anō 👋

Tides & Moon Phases (Arapo)
Low Tide - 02:05am
High Tide - 08:22am
Low Tide - 02:54pm
High Tide - 08:58pm

Po Otu

Northern and Southern Cooks
Weather Bulletin issued from CIMS Nikao - Rarotonga
Thursday 28th May 2026 at 06:20pm CILT.
A DAMAGING HEAVY SWELL WARNING REMAINS IN FORCE FOR OPEN WATERS OF SOUTHERN COOKS.

A COASTAL INUNDATION ALERT REMAINS IN FORCE FOR SOUTHERN COOK COASTAL AREAS.

Situation:
A low pressure system to the far south of Southern Cooks generates and directs damaging southerly swells over Southern Cooks. Meanwhile, a weak trough of low pressure lies just east of Southern Cooks.

A moist easterly wind flow prevails over Northern Cooks. Meanwhile, a weak trough of low pressure lies slow moving over the southwestern part of the group.

Forecast to midnight tomorrow for the Southern Cooks:
Occasional showers and isolated thunderstorms. Showers clearing later today. Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.
Further outlook: Cloudy periods with brief showers. Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides. Strong southeasterly winds developing.

For Rarotonga:
Occasional showers and isolated thunderstorms. Showers clearing later today. Expect damaging heavy swells with heights up to 3.0m over open waters with risk of coastal inundation during high tides.
Moderate to fresh southeast winds, gusty at times.
Moderate to rough seas.
Further outlook: Cloudy periods with brief showers. Expect damaging heavy swells with heights up to 3.0m over open waters withrisk of coastal inundation during high tides. Strong southeasterly winds developing.

For the Northern Cooks:
Cloudy periods with some showers over the southwestern parts.
Elsewhere, fine apart from brief showers.
Moderate to fresh easterly winds.
Moderate to rough seas.
Further outlook: Cloudy periods with some showers and isolated thunderstorms over the southwestern parts. Elsewhere, fine apart from brief showers.

Moon Phase (ARAPO) & Tides
2 Days before Full Moon (MAITU)

High: 08:10pm and 08:20am
Low: 02:10pm and 02:05am

Northern and Southern Cooks
Weather Bulletin issued from CIMS Nikao May 28 06.20 CILT.
A DAMAGING HEAVY SWELL WARNING REMAINS IN FORCE FOR OPEN WATERS OF
SOUTHERN COOKS.

A COASTAL INUNDATION ALERT REMAINS IN FORCE FOR SOUTHERN COOK COASTAL
AREAS.

A HEAVY RAIN ALERT REMAINS IN FORCE FOR SOUTHERN COOKS.

A STRONG WIND WARNING REMAINS IN FORCE FOR SOUTHERN COOK LAND AREAS
AND WATERS.

Situation:
A low pressure system to the far south of Southern Cooks generates
and directs damaging southerly swells over Southern Cooks. Meanwhile,
a trough of low pressure with associated cloud and rain affects
Southern Cooks.

A moist easterly wind flow prevails over Northern Cooks. Meanwhile, a
weak trough of low pressure lies slow moving over the southwestern
part of the group.

Forecast to midnight tonight for the Southern Cooks:
Occasional rain, heavy at times and few thunderstorms. Rain easing to
some showers later today.
Expect damaging heavy swells with heights up to 3.5m over open waters
with risk of coastal inundation during high tides.
Northwesterly winds 20 to 25 knots. Winds turning and becoming
westerly later today.
Rough seas.

Further outlook: Cloudy periods with some showers. Expect damaging
heavy swells with heights up to 3.5m over open waters with risk of
coastal inundation during high tides. Southeasterly winds 20 to 25
knots.

For Rarotonga:
Occasional rain, heavy at times and few thunderstorms. Rain easing to
some showers later today.
Expect damaging heavy swells with heights up to 3.5m over open waters
with risk of coastal inundation during high tides.
Northwesterly winds 20 to 25 knots. Winds turning and becoming
westerly later today.
Rough seas.
Further outlook: Cloudy periods with some showers. Expect damaging
heavy swells with heights up to 3.5m over open waters with risk of
coastal inundation during high tides. Southeasterly winds 20 to 25
knots.

For the Northern Cooks:
Cloudy periods with some showers over the southwestern parts.
Elsewhere, fine apart from brief showers.
Moderate to fresh easterly winds.
Moderate to rough seas.

Further outlook: Cloudy periods with some showers and isolated
thunderstorms over the southwestern parts. Elsewhere, fine apart from
brief showers.

🌊 If you can hear the ocean from your house tonight… just know it’s not saying hello. It’s issuing threats 😭💅

Southern Cooks, the weather has officially entered its toxic era tonight.

⚠️ Heavy Swell Warning STILL in force
⚠️ Strong Wind Warning STILL active
⚠️ Heavy Rain Alert STILL hanging around
⚠️ Coastal flooding possible during high tides

So yes… the atmosphere is currently doing the absolute most.

SOUTHERN COOKS & RAROTONGA ⛈️
Expect periods of rain tonight, heavy at times, with thunderstorms casually pulling up uninvited ⛈️😂The sea remains VERY rough with damaging swells reaching up to 3.5 metres in open waters 🌊
Translation: the ocean is not calm, peaceful, or spiritually aligned right now. High tides may also cause water to spill into low-lying coastal areas, so if the lagoon starts looking suspiciously confident tonight… now you know why 😭Strong northwesterly winds continue tonight before turning westerly tomorrow. Honestly, even the trees are fighting for their lives tonight 🌴😂

NORTHERN COOKS 🌴
You lot are still winning for now 😌
Some cloudy periods and showers around the southwest parts of the group, but elsewhere stays mostly fine with brief passing showers. Moderate to fresh easterly winds continue with moderate to rough seas.

Before we sign off, just a friendly reminder tonight:
☔ Bring the washing inside
🌊 Stay away from rough coastal areas if you can
🚗 Drive carefully in heavy rain

We’ll keep monitoring the situation and provide updates as needed. Until then… stay safe, stay dry, and maybe don’t trust the ocean tonight😭🌊ka kite ano

Tides & Moon phases (Arapo)

High Tide - 07:19pm ⚠️
Low Tide - 01:13am Tomorrow
High Tide - 07:35am Tomorrow ⚠️
Low Tide - 02:07pm Tomorrow

Po UA

Northern and Southern Cooks
Weather Bulletin issued from CIMS Nikao - Rarotonga
Wednesday 27th May 2026 at 06:30am CILT.
A DAMAGING HEAVY SWELL WARNING REMAINS IN FORCE FOR OPEN WATERS OF SOUTHERN COOKS.

A COASTAL INUNDATION ALERT REMAINS IN FORCE FOR SOUTHERN COOK COASTAL AREAS.

A HEAVY RAIN ALERT REMAINS IN FORCE FOR SOUTHERN COOKS.

A STRONG WIND WARNING REMAINS IN FORCE FOR SOUTHERN COOK LAND AREAS AND WATERS.

Situation:
A low pressure system to the far south of Southern Cooks is expected to generate and direct damaging southerly swells over Southern Cooks. Meanwhile, a trough of low pressure with cloud and rain affects Southern Cooks.

A moist easterly wind flow prevails over Northern Cooks. Meanwhile, a weak trough of low pressure lies slow moving to the southwest of the group.

Forecast to midnight tonight for the Southern Cooks:
Occasional rain, heavy at times and few thunderstorms. Expect
damaging heavy swells with heights up to 3.5m over open waters with risk of coastal inundation during high tides. Northeast to northwest winds 20 to 25 knots.
Rough seas.
Further outlook: Occasional rain, heavy at times and few
thunderstorms. Expect damaging heavy swells with heights up to 3.5m over open waters with risk of coastal inundation during high tides. Northeast to northwest winds 20 to 25 knots.

For Rarotonga:
Occasional rain, heavy at times and few thunderstorms. Expect
damaging heavy swells with heights up to 3.5m over open waters with risk of coastal inundation during high tides. Northeast to northwest winds 20 to 25 knots
Further outlook: Occasional rain, heavy at times and few thunderstorms. Risk of coastal sea flooding during high tide.
Northeast to northwest winds 20 to 25 knots.

For the Northern Cooks:
Cloudy periods with some showers over the southwestern parts.
Elsewhere, fine apart from brief showers.
Moderate to fresh easterly winds.
Moderate to rough seas.
Further outlook: Cloudy periods with some showers and isolated
thunderstorms over the southwestern parts. Elsewhere, fine apart from brief showers.

Moon Phase (ARAPO) & Tides
3 days before Full Moon (UA)

High: 06:45am and 07:20pm
Low: 12:20am and 01:15pm

Northern and Southern Cooks
Weather Bulletin issued from Cims 26th May 2026 at 06:42am

A DAMAGING HEAVY SWELL WARNING REMAINS IN FORCE FOR OPEN WATERS OF
SOUTHERN COOKS.

A COASTAL INUNDATION ALERT REMAINS IN FORCE FOR SOUTHERN COOK COASTAL
AREAS.

A HEAVY RAIN ALERT REMAINS IN FORCE FOR SOUTHERN COOKS.

A STRONG WIND WARNING REMAINS IN FORCE FOR SOUTHERN COOK LAND AREAS
AND WATERS.

Situation:
A low pressure system to the far south of Southern Cooks is expected
to generate and direct damaging southerly swells over Southern Cooks.
Meanwhile, a trough of low pressure with cloud and rain affects
Southern Cooks.

A moist easterly wind flow prevails over Northern Cooks. Meanwhile, a
trough of low pressure lies slow moving over the southwestern parts
of the group.

Forecast to midnight tonight for the Southern Cooks:
Occasional rain, heavy at times and few thunderstorms. Expect
damaging heavy swells with heights up to 3.5m over open waters with
risk of coastal inundation during high tides. Northeast to northwest
winds 20 to 25 knots.
Rough seas.

Further outlook: Occasional rain, heavy at times and few
thunderstorms. Expect damaging heavy swells with heights up to 3.5m
over open waters with risk of coastal inundation during high tides.
Northeast to northwest winds 20 to 25 knots.

For Rarotonga:
Occasional rain, heavy at times and few thunderstorms. Expect
damaging heavy swells with heights up to 3.5m over open waters with
risk of coastal inundation during high tides. Northeast to northwest
winds 20 to 25 knots
Further outlook: Occasional rain, heavy at times and few
thunderstorms. Risk of coastal sea flooding during high tide.
Northeast to northwest winds 20 to 25 knots.

For the Northern Cooks:
Cloudy periods with some showers and isolated thunderstorms over the
southwestern parts. Elsewhere, fine apart from brief showers.
Moderate to fresh easterly winds.
Moderate to rough seas.

Further outlook: Cloudy periods with some showers.

Moon Phase (Arapo)
Po Maaru

Tides;
High tide - 05:41am & 06:22pm
Low Tide - 12:16pm & 12:18am (Tomorrow)