Bunaken Water Temperature
Updated Tue 14:52 (Asia/Makassar)
Indonesia · Forecast updated Sep 22, 2026, 14:52 UTC · refresh delayed
Current Sea Temperature
29.6°C
85.3°F
Very warm water
Valid Sep 22, 2026, 14:52 (Asia/Makassar). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.7°C below
The typical September average is 30.3°C (86.5°F) from the historical baseline.
Recent trend
Cooling by 0.5°C
Seven-day average: 29.6°C, versus 30.1°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 Bunaken, typical monthly averages range from about 29.0°C (84.2°F) in February to 30.4°C (86.7°F) in November.
Over the past 30 days, the average sea temperature in Bunaken has been 29.8°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Bunaken, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 29.1–29.9°C | 29.5°C / 85.1°F |
| February | 28.9–29.2°C | 29.0°C / 84.2°F |
| March | 28.3–29.5°C | 29.1°C / 84.4°F |
| April | 28.4–29.9°C | 29.4°C / 84.9°F |
| May | 29.7–30.5°C | 30.2°C / 86.4°F |
| June | 30.0–30.7°C | 30.3°C / 86.5°F |
| July | 30.0–30.3°C | 30.1°C / 86.2°F |
| August | 30.1–30.3°C | 30.2°C / 86.4°F |
| September | 30.2–30.4°C | 30.3°C / 86.5°F |
| October | 30.2–30.5°C | 30.3°C / 86.5°F |
| November | 30.3–30.7°C | 30.4°C / 86.7°F |
| December | 29.9–30.3°C | 30.1°C / 86.2°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (1.63, 124.79). 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 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Bunaken in January
Typical January water temperature near Bunaken is 29.5°C (85.1°F), with yearly monthly means from 29.1–29.9°C.
Bunaken in February
Typical February water temperature near Bunaken is 29.0°C (84.2°F), with yearly monthly means from 28.9–29.2°C.
Bunaken in March
Typical March water temperature near Bunaken is 29.1°C (84.4°F), with yearly monthly means from 28.3–29.5°C.
Bunaken in April
Typical April water temperature near Bunaken is 29.4°C (84.9°F), with yearly monthly means from 28.4–29.9°C.
Bunaken in May
Typical May water temperature near Bunaken is 30.2°C (86.4°F), with yearly monthly means from 29.7–30.5°C.
Bunaken in June
Typical June water temperature near Bunaken is 30.3°C (86.5°F), with yearly monthly means from 30.0–30.7°C.
Bunaken in July
Typical July water temperature near Bunaken is 30.1°C (86.2°F), with yearly monthly means from 30.0–30.3°C.
Bunaken in August
Typical August water temperature near Bunaken is 30.2°C (86.4°F), with yearly monthly means from 30.1–30.3°C.
Bunaken in September
Typical September water temperature near Bunaken is 30.3°C (86.5°F), with yearly monthly means from 30.2–30.4°C.
Bunaken in October
Typical October water temperature near Bunaken is 30.3°C (86.5°F), with yearly monthly means from 30.2–30.5°C.
Bunaken in November
Typical November water temperature near Bunaken is 30.4°C (86.7°F), with yearly monthly means from 30.3–30.7°C.
Bunaken in December
Typical December water temperature near Bunaken is 30.1°C (86.2°F), with yearly monthly means from 29.9–30.3°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 | 30.0°C / 86.0°F | 30.5°C / 86.8°F | 31.1°C / 88.0°F |
| July | 29.9°C / 85.8°F | 30.5°C / 86.9°F | 31.1°C / 88.0°F |
| August | 29.2°C / 84.6°F | 29.9°C / 85.7°F | 30.4°C / 86.7°F |
| September | 29.1°C / 84.4°F | 29.9°C / 85.7°F | 30.5°C / 86.9°F |
Partial coverage: 4 calendar months with records. Profile calculated from 2735 hourly forecast records across 4 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Bunaken
Marine park island near Manado famous for vertical coral walls teeming with fish.
- Area
- North Sulawesi
Bunaken Water Temperature: Common Questions
What is the water temperature in Bunaken today?
The current sea surface temperature near Bunaken is 29.6°C (85.3°F). Over the last 30 days, the average has been 29.8°C.
When is the water warmest in Bunaken?
The water is typically warmest in November, at around 30.4°C (86.7°F) in the 2023–2025 historical baseline.
When is the water coldest in Bunaken?
The water is typically coldest in February, at around 29.0°C (84.2°F) in the same historical baseline.
Can you swim in Bunaken today?
At 29.6°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 Bunaken.
View Snorkel Forecast →