Lanikai Beach Water Temperature
Updated Sun 10:48 (Pacific/Honolulu)
USA · Forecast updated Sep 27, 2026, 10:48 UTC
Current Sea Temperature
26.8°C
80.2°F
Warm water
Valid Sep 27, 2026, 10:48 (Pacific/Honolulu). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
Close to average
The typical September average is 26.8°C (80.2°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 26.8°C, versus 26.7°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 Lanikai Beach, typical monthly averages range from about 24.2°C (75.6°F) in February to 26.9°C (80.4°F) in October.
Over the past 30 days, the average sea temperature in Lanikai Beach has been 26.8°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Lanikai Beach, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 24.7–25.1°C | 24.9°C / 76.8°F |
| February | 24.1–24.3°C | 24.2°C / 75.6°F |
| March | 23.8–24.6°C | 24.3°C / 75.7°F |
| April | 24.0–24.9°C | 24.6°C / 76.3°F |
| May | 24.6–25.5°C | 24.9°C / 76.8°F |
| June | 25.5–25.7°C | 25.6°C / 78.1°F |
| July | 26.0–26.3°C | 26.1°C / 79.0°F |
| August | 26.3–26.5°C | 26.4°C / 79.5°F |
| September | 26.7–26.9°C | 26.8°C / 80.2°F |
| October | 26.8–27.0°C | 26.9°C / 80.4°F |
| November | 25.7–26.4°C | 26.0°C / 78.8°F |
| December | 25.3–25.6°C | 25.4°C / 77.7°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (21.38, -157.63). 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.
Lanikai Beach in January
Typical January water temperature near Lanikai Beach is 24.9°C (76.8°F), with yearly monthly means from 24.7–25.1°C.
Lanikai Beach in February
Typical February water temperature near Lanikai Beach is 24.2°C (75.6°F), with yearly monthly means from 24.1–24.3°C.
Lanikai Beach in March
Typical March water temperature near Lanikai Beach is 24.3°C (75.7°F), with yearly monthly means from 23.8–24.6°C.
Lanikai Beach in April
Typical April water temperature near Lanikai Beach is 24.6°C (76.3°F), with yearly monthly means from 24.0–24.9°C.
Lanikai Beach in May
Typical May water temperature near Lanikai Beach is 24.9°C (76.8°F), with yearly monthly means from 24.6–25.5°C.
Lanikai Beach in June
Typical June water temperature near Lanikai Beach is 25.6°C (78.1°F), with yearly monthly means from 25.5–25.7°C.
Lanikai Beach in July
Typical July water temperature near Lanikai Beach is 26.1°C (79.0°F), with yearly monthly means from 26.0–26.3°C.
Lanikai Beach in August
Typical August water temperature near Lanikai Beach is 26.4°C (79.5°F), with yearly monthly means from 26.3–26.5°C.
Lanikai Beach in September
Typical September water temperature near Lanikai Beach is 26.8°C (80.2°F), with yearly monthly means from 26.7–26.9°C.
Lanikai Beach in October
Typical October water temperature near Lanikai Beach is 26.9°C (80.4°F), with yearly monthly means from 26.8–27.0°C.
Lanikai Beach in November
Typical November water temperature near Lanikai Beach is 26.0°C (78.8°F), with yearly monthly means from 25.7–26.4°C.
Lanikai Beach in December
Typical December water temperature near Lanikai Beach is 25.4°C (77.7°F), with yearly monthly means from 25.3–25.6°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 | 26.1°C / 79.0°F | 26.3°C / 79.3°F | 26.5°C / 79.7°F |
| July | 25.7°C / 78.3°F | 26.1°C / 79.0°F | 26.6°C / 79.9°F |
| August | 25.8°C / 78.4°F | 26.4°C / 79.6°F | 27.1°C / 80.8°F |
| September | 26.5°C / 79.7°F | 26.8°C / 80.3°F | 27.6°C / 81.7°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2255 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Lanikai Beach
Windward beach with pretty water and patchy reef; best before trade winds build.
- Area
- Kailua
- Local timing
- Morning before trades
- Exposure
- Windward east shore
- Entry type
- Sandy beach and patch reef
- Difficulty
- Easy
Lanikai Beach Water Temperature: Common Questions
What is the water temperature in Lanikai Beach today?
The current sea surface temperature near Lanikai Beach is 26.8°C (80.2°F). Over the last 30 days, the average has been 26.8°C.
When is the water warmest in Lanikai Beach?
The water is typically warmest in October, at around 26.9°C (80.4°F) in the 2023–2025 historical baseline.
When is the water coldest in Lanikai 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 Lanikai Beach today?
At 26.8°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 Lanikai Beach.
View Snorkel Forecast →