INSTRUMENT / SEA TEMPERATURE
Aitutaki Lagoon Water Temperature
Updated Sat 14:55 (Pacific/Rarotonga)
Cook Islands · Forecast updated Nov 7, 2026, 14:55 UTC
Current Sea Temperature
24.7°C
76.5°F
Mild water
Valid Nov 7, 2026, 14:55 (Pacific/Rarotonga). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.9°C below
The typical November average is 26.6°C (79.9°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 25.1°C, versus 25.1°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Aitutaki Lagoon, typical monthly averages range from about 25.7°C (78.3°F) in September to 29.0°C (84.2°F) in March.
Over the past 30 days, the average sea temperature in Aitutaki Lagoon has been 24.9°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Aitutaki Lagoon, calculated from hourly observations for 2022–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 27.5–28.2°C | 27.9°C / 82.2°F |
| February | 28.6–28.9°C | 28.8°C / 83.8°F |
| March | 28.9–29.1°C | 29.0°C / 84.2°F |
| April | 28.6–29.0°C | 28.8°C / 83.8°F |
| May | 27.1–27.6°C | 27.4°C / 81.3°F |
| June | 26.7–26.9°C | 26.8°C / 80.2°F |
| July | 26.0–26.7°C | 26.4°C / 79.5°F |
| August | 25.4–26.4°C | 25.9°C / 78.6°F |
| September | 25.4–25.9°C | 25.7°C / 78.3°F |
| October | 25.5–26.0°C | 25.8°C / 78.4°F |
| November | 26.2–27.0°C | 26.6°C / 79.9°F |
| December | 26.9–27.2°C | 27.0°C / 80.6°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-18.88, -159.79). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2022–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Aitutaki Lagoon in January
Typical January water temperature near Aitutaki Lagoon is 27.9°C (82.2°F), with yearly monthly means from 27.5–28.2°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: December 27.0°C · February 28.8°C.
Explore Aitutaki Lagoon sea temperature in January, including swim comfort and month comparisons →
Aitutaki Lagoon in February
Typical February water temperature near Aitutaki Lagoon is 28.8°C (83.8°F), with yearly monthly means from 28.6–28.9°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: January 27.9°C · March 29.0°C.
Explore Aitutaki Lagoon sea temperature in February, including swim comfort and month comparisons →
Aitutaki Lagoon in March
Typical March water temperature near Aitutaki Lagoon is 29.0°C (84.2°F), with yearly monthly means from 28.9–29.1°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: February 28.8°C · April 28.8°C.
Explore Aitutaki Lagoon sea temperature in March, including swim comfort and month comparisons →
Aitutaki Lagoon in April
Typical April water temperature near Aitutaki Lagoon is 28.8°C (83.8°F), with yearly monthly means from 28.6–29.0°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: March 29.0°C · May 27.4°C.
Explore Aitutaki Lagoon sea temperature in April, including swim comfort and month comparisons →
Aitutaki Lagoon in May
Typical May water temperature near Aitutaki Lagoon is 27.4°C (81.3°F), with yearly monthly means from 27.1–27.6°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: April 28.8°C · June 26.8°C.
Explore Aitutaki Lagoon sea temperature in May, including swim comfort and month comparisons →
Aitutaki Lagoon in June
Typical June water temperature near Aitutaki Lagoon is 26.8°C (80.2°F), with yearly monthly means from 26.7–26.9°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: May 27.4°C · July 26.4°C.
Explore Aitutaki Lagoon sea temperature in June, including swim comfort and month comparisons →
Aitutaki Lagoon in July
Typical July water temperature near Aitutaki Lagoon is 26.4°C (79.5°F), with yearly monthly means from 26.0–26.7°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: June 26.8°C · August 25.9°C.
Explore Aitutaki Lagoon sea temperature in July, including swim comfort and month comparisons →
Aitutaki Lagoon in August
Typical August water temperature near Aitutaki Lagoon is 25.9°C (78.6°F), with yearly monthly means from 25.4–26.4°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: July 26.4°C · September 25.7°C.
Explore Aitutaki Lagoon sea temperature in August, including swim comfort and month comparisons →
Aitutaki Lagoon in September
Typical September water temperature near Aitutaki Lagoon is 25.7°C (78.3°F), with yearly monthly means from 25.4–25.9°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: August 25.9°C · October 25.8°C.
Explore Aitutaki Lagoon sea temperature in September, including swim comfort and month comparisons →
Aitutaki Lagoon in October
Typical October water temperature near Aitutaki Lagoon is 25.8°C (78.4°F), with yearly monthly means from 25.5–26.0°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: September 25.7°C · November 26.6°C.
Explore Aitutaki Lagoon sea temperature in October, including swim comfort and month comparisons →
Aitutaki Lagoon in November
Typical November water temperature near Aitutaki Lagoon is 26.6°C (79.9°F), with yearly monthly means from 26.2–27.0°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: October 25.8°C · December 27.0°C.
Explore Aitutaki Lagoon sea temperature in November, including swim comfort and month comparisons →
Aitutaki Lagoon in December
Typical December water temperature near Aitutaki Lagoon is 27.0°C (80.6°F), with yearly monthly means from 26.9–27.2°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: November 26.6°C · January 27.9°C.
Explore Aitutaki Lagoon sea temperature in December, including swim comfort and month comparisons →
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 26.1°C / 79.0°F | 26.5°C / 79.7°F | 27.2°C / 81.0°F |
| July | 24.4°C / 75.9°F | 25.2°C / 77.4°F | 26.1°C / 79.0°F |
| August | 25.1°C / 77.2°F | 25.3°C / 77.6°F | 25.7°C / 78.3°F |
| September | 24.8°C / 76.6°F | 25.4°C / 77.7°F | 26.1°C / 79.0°F |
| October | 24.5°C / 76.1°F | 24.8°C / 76.7°F | 25.6°C / 78.1°F |
| November | 24.6°C / 76.3°F | 25.0°C / 76.9°F | 25.7°C / 78.3°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3839 hourly forecast records across 6 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Aitutaki Lagoon
Triangular lagoon of impossibly clear turquoise water and coral bommies.
- Area
- Aitutaki
Aitutaki Lagoon Water Temperature: Common Questions
What is the water temperature in Aitutaki Lagoon today?
The current sea surface temperature near Aitutaki Lagoon is 24.7°C (76.5°F). Over the last 30 days, the average has been 24.9°C.
When is the water warmest in Aitutaki Lagoon?
The water is typically warmest in March, at around 29.0°C (84.2°F) in the 2022–2025 historical baseline.
When is the water coldest in Aitutaki Lagoon?
The water is typically coldest in September, at around 25.7°C (78.3°F) in the same historical baseline.
Can you swim in Aitutaki Lagoon today?
At 24.7°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Aitutaki Lagoon.
View Snorkel Forecast →