Two Step Honaunau Water Temperature
Updated Tue 15:28 (Pacific/Honolulu)
USA · Forecast updated Sep 22, 2026, 15:28 UTC
Current Sea Temperature
28.6°C
83.5°F
Very warm water
Valid Sep 22, 2026, 15:28 (Pacific/Honolulu). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.2°C above
The typical September average is 27.4°C (81.3°F) from the historical baseline.
Recent trend
Holding fairly steady
Seven-day average: 28.8°C, versus 28.7°C in the prior seven days.
What to wear
Very warm water
Swimwear is usually enough; a rash guard adds sun protection.
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 Two Step Honaunau, typical monthly averages range from about 25.2°C (77.4°F) in February to 27.4°C (81.3°F) in September.
Over the past 30 days, the average sea temperature in Two Step Honaunau has been 28.6°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Two Step Honaunau, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 25.2–25.7°C | 25.5°C / 77.9°F |
| February | 25.1–25.4°C | 25.2°C / 77.4°F |
| March | 25.1–25.7°C | 25.3°C / 77.5°F |
| April | 25.3–26.0°C | 25.6°C / 78.1°F |
| May | 26.0–26.5°C | 26.2°C / 79.2°F |
| June | 26.5–26.8°C | 26.6°C / 79.9°F |
| July | 26.7–27.1°C | 26.9°C / 80.4°F |
| August | 27.2–27.4°C | 27.2°C / 81.0°F |
| September | 27.3–27.5°C | 27.4°C / 81.3°F |
| October | 27.1–27.2°C | 27.2°C / 81.0°F |
| November | 26.6–27.0°C | 26.7°C / 80.1°F |
| December | 25.9–26.4°C | 26.2°C / 79.2°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (19.46, -155.88). 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.
Two Step Honaunau in January
Typical January water temperature near Two Step Honaunau is 25.5°C (77.9°F), with yearly monthly means from 25.2–25.7°C.
Two Step Honaunau in February
Typical February water temperature near Two Step Honaunau is 25.2°C (77.4°F), with yearly monthly means from 25.1–25.4°C.
Two Step Honaunau in March
Typical March water temperature near Two Step Honaunau is 25.3°C (77.5°F), with yearly monthly means from 25.1–25.7°C.
Two Step Honaunau in April
Typical April water temperature near Two Step Honaunau is 25.6°C (78.1°F), with yearly monthly means from 25.3–26.0°C.
Two Step Honaunau in May
Typical May water temperature near Two Step Honaunau is 26.2°C (79.2°F), with yearly monthly means from 26.0–26.5°C.
Two Step Honaunau in June
Typical June water temperature near Two Step Honaunau is 26.6°C (79.9°F), with yearly monthly means from 26.5–26.8°C.
Two Step Honaunau in July
Typical July water temperature near Two Step Honaunau is 26.9°C (80.4°F), with yearly monthly means from 26.7–27.1°C.
Two Step Honaunau in August
Typical August water temperature near Two Step Honaunau is 27.2°C (81.0°F), with yearly monthly means from 27.2–27.4°C.
Two Step Honaunau in September
Typical September water temperature near Two Step Honaunau is 27.4°C (81.3°F), with yearly monthly means from 27.3–27.5°C.
Two Step Honaunau in October
Typical October water temperature near Two Step Honaunau is 27.2°C (81.0°F), with yearly monthly means from 27.1–27.2°C.
Two Step Honaunau in November
Typical November water temperature near Two Step Honaunau is 26.7°C (80.1°F), with yearly monthly means from 26.6–27.0°C.
Two Step Honaunau in December
Typical December water temperature near Two Step Honaunau is 26.2°C (79.2°F), with yearly monthly means from 25.9–26.4°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 | 26.6°C / 79.9°F | 27.4°C / 81.3°F | 28.3°C / 82.9°F |
| July | 26.9°C / 80.4°F | 27.9°C / 82.2°F | 28.7°C / 83.7°F |
| August | 27.2°C / 81.0°F | 28.0°C / 82.4°F | 29.0°C / 84.2°F |
| September | 27.5°C / 81.5°F | 28.7°C / 83.6°F | 29.5°C / 85.1°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2736 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Two Step Honaunau
Next to Pu'uhonua o Honaunau on the Big Island, Two Step is a celebrated Kona-coast snorkeling site with an easy lava-ledge entry, thriving reef and frequent dolphins. Go early for the calmest, clearest conditions.
- Area
- Big Island, Hawaii
Two Step Honaunau Water Temperature: Common Questions
What is the water temperature in Two Step Honaunau today?
The current sea surface temperature near Two Step Honaunau is 28.6°C (83.5°F). Over the last 30 days, the average has been 28.6°C.
When is the water warmest in Two Step Honaunau?
The water is typically warmest in September, at around 27.4°C (81.3°F) in the 2023–2025 historical baseline.
When is the water coldest in Two Step Honaunau?
The water is typically coldest in February, at around 25.2°C (77.4°F) in the same historical baseline.
Can you swim in Two Step Honaunau today?
At 28.6°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 Two Step Honaunau.
View Snorkel Forecast →