Anini Beach Water Temperature
Updated Sat 14:41 (Pacific/Honolulu)
USA · Forecast updated Sep 26, 2026, 14:41 UTC
Current Sea Temperature
26.0°C
78.8°F
Warm water
Valid Sep 26, 2026, 14:41 (Pacific/Honolulu). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.1°C below
The typical September average is 27.1°C (80.8°F) from the historical baseline.
Recent trend
Warming by 0.3°C
Seven-day average: 26.7°C, versus 26.4°C in the prior seven days.
What to wear
Warm water
Most people are comfortable in swimwear or a light rash guard.
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 Anini Beach, typical monthly averages range from about 24.2°C (75.6°F) in February to 27.4°C (81.3°F) in October.
Over the past 30 days, the average sea temperature in Anini Beach has been 26.5°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Anini Beach, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 24.5–25.1°C | 24.8°C / 76.6°F |
| February | 24.1–24.4°C | 24.2°C / 75.6°F |
| March | 23.4–25.0°C | 24.2°C / 75.6°F |
| April | 24.1–25.4°C | 24.6°C / 76.3°F |
| May | 25.3–25.4°C | 25.3°C / 77.5°F |
| June | 25.7–26.2°C | 25.9°C / 78.6°F |
| July | 26.1–26.2°C | 26.2°C / 79.2°F |
| August | 26.5–26.9°C | 26.7°C / 80.1°F |
| September | 26.9–27.6°C | 27.1°C / 80.8°F |
| October | 27.1–27.9°C | 27.4°C / 81.3°F |
| November | 26.5–26.7°C | 26.6°C / 79.9°F |
| December | 25.8–26.0°C | 25.9°C / 78.6°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (22.38, -159.46). 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 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Anini Beach in January
Typical January water temperature near Anini Beach is 24.8°C (76.6°F), with yearly monthly means from 24.5–25.1°C.
Anini Beach in February
Typical February water temperature near Anini Beach is 24.2°C (75.6°F), with yearly monthly means from 24.1–24.4°C.
Anini Beach in March
Typical March water temperature near Anini Beach is 24.2°C (75.6°F), with yearly monthly means from 23.4–25.0°C.
Anini Beach in April
Typical April water temperature near Anini Beach is 24.6°C (76.3°F), with yearly monthly means from 24.1–25.4°C.
Anini Beach in May
Typical May water temperature near Anini Beach is 25.3°C (77.5°F), with yearly monthly means from 25.3–25.4°C.
Anini Beach in June
Typical June water temperature near Anini Beach is 25.9°C (78.6°F), with yearly monthly means from 25.7–26.2°C.
Anini Beach in July
Typical July water temperature near Anini Beach is 26.2°C (79.2°F), with yearly monthly means from 26.1–26.2°C.
Anini Beach in August
Typical August water temperature near Anini Beach is 26.7°C (80.1°F), with yearly monthly means from 26.5–26.9°C.
Anini Beach in September
Typical September water temperature near Anini Beach is 27.1°C (80.8°F), with yearly monthly means from 26.9–27.6°C.
Anini Beach in October
Typical October water temperature near Anini Beach is 27.4°C (81.3°F), with yearly monthly means from 27.1–27.9°C.
Anini Beach in November
Typical November water temperature near Anini Beach is 26.6°C (79.9°F), with yearly monthly means from 26.5–26.7°C.
Anini Beach in December
Typical December water temperature near Anini Beach is 25.9°C (78.6°F), with yearly monthly means from 25.8–26.0°C.
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 | 25.0°C / 77.0°F | 25.1°C / 77.2°F | 25.2°C / 77.4°F |
| July | 25.1°C / 77.2°F | 26.2°C / 79.1°F | 26.9°C / 80.4°F |
| August | 25.2°C / 77.4°F | 26.4°C / 79.5°F | 27.2°C / 81.0°F |
| September | 25.4°C / 77.7°F | 26.4°C / 79.6°F | 27.6°C / 81.7°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2235 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Anini Beach
Long protected reef lagoon that is often one of Kauai's calmer snorkel options.
- Area
- North Shore
- Local timing
- Morning
- Exposure
- Reef-protected north shore; avoid high surf
- Entry type
- Long sandy beach behind barrier reef
- Difficulty
- Easy
Anini Beach Water Temperature: Common Questions
What is the water temperature in Anini Beach today?
The current sea surface temperature near Anini Beach is 26.0°C (78.8°F). Over the last 30 days, the average has been 26.5°C.
When is the water warmest in Anini Beach?
The water is typically warmest in October, at around 27.4°C (81.3°F) in the 2023–2025 historical baseline.
When is the water coldest in Anini Beach?
The water is typically coldest in February, at around 24.2°C (75.6°F) in the same historical baseline.
Can you swim in Anini Beach today?
At 26.0°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 Anini Beach.
View Snorkel Forecast →