INSTRUMENT / SEA TEMPERATURE
Okinawa - Blue Cave Water Temperature
Updated Fri 17:05 (Asia/Tokyo)
Japan · Forecast updated Nov 6, 2026, 17:05 UTC
Current Sea Temperature
26.6°C
79.9°F
Warm water
Valid Nov 6, 2026, 17:05 (Asia/Tokyo). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.3°C above
The typical November average is 26.3°C (79.3°F) from the historical baseline.
Recent trend
Cooling by 0.7°C
Seven-day average: 26.7°C, versus 27.5°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 Okinawa - Blue Cave, typical monthly averages range from about 21.5°C (70.7°F) in March to 29.8°C (85.6°F) in September.
Over the past 30 days, the average sea temperature in Okinawa - Blue Cave has been 27.6°C.
Historical baseline (full year)
Northern Hemisphere. Summer is generally June–August; winter is December–February.
Typical monthly sea-surface temperature near Okinawa - Blue Cave, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 21.7–22.6°C | 22.2°C / 72.0°F |
| February | 21.1–22.1°C | 21.6°C / 70.9°F |
| March | 21.0–22.0°C | 21.5°C / 70.7°F |
| April | 22.0–23.5°C | 22.8°C / 73.0°F |
| May | 23.8–24.8°C | 24.3°C / 75.7°F |
| June | 26.0–27.8°C | 26.9°C / 80.4°F |
| July | 29.2–30.0°C | 29.5°C / 85.1°F |
| August | 28.4–30.7°C | 29.7°C / 85.5°F |
| September | 29.3–30.2°C | 29.8°C / 85.6°F |
| October | 27.8–29.4°C | 28.5°C / 83.3°F |
| November | 25.5–26.7°C | 26.3°C / 79.3°F |
| December | 23.8–24.3°C | 24.0°C / 75.2°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (26.46, 127.79). 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.
Okinawa - Blue Cave in January
Typical January water temperature near Okinawa - Blue Cave is 22.2°C (72.0°F), with yearly monthly means from 21.7–22.6°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: December 24.0°C · February 21.6°C.
Okinawa - Blue Cave in February
Typical February water temperature near Okinawa - Blue Cave is 21.6°C (70.9°F), with yearly monthly means from 21.1–22.1°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: January 22.2°C · March 21.5°C.
Okinawa - Blue Cave in March
Typical March water temperature near Okinawa - Blue Cave is 21.5°C (70.7°F), with yearly monthly means from 21.0–22.0°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: February 21.6°C · April 22.8°C.
Explore Okinawa - Blue Cave sea temperature in March, including swim comfort and month comparisons →
Okinawa - Blue Cave in April
Typical April water temperature near Okinawa - Blue Cave is 22.8°C (73.0°F), with yearly monthly means from 22.0–23.5°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: March 21.5°C · May 24.3°C.
Explore Okinawa - Blue Cave sea temperature in April, including swim comfort and month comparisons →
Okinawa - Blue Cave in May
Typical May water temperature near Okinawa - Blue Cave is 24.3°C (75.7°F), with yearly monthly means from 23.8–24.8°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: April 22.8°C · June 26.9°C.
Explore Okinawa - Blue Cave sea temperature in May, including swim comfort and month comparisons →
Okinawa - Blue Cave in June
Typical June water temperature near Okinawa - Blue Cave is 26.9°C (80.4°F), with yearly monthly means from 26.0–27.8°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: May 24.3°C · July 29.5°C.
Explore Okinawa - Blue Cave sea temperature in June, including swim comfort and month comparisons →
Okinawa - Blue Cave in July
Typical July water temperature near Okinawa - Blue Cave is 29.5°C (85.1°F), with yearly monthly means from 29.2–30.0°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: June 26.9°C · August 29.7°C.
Explore Okinawa - Blue Cave sea temperature in July, including swim comfort and month comparisons →
Okinawa - Blue Cave in August
Typical August water temperature near Okinawa - Blue Cave is 29.7°C (85.5°F), with yearly monthly means from 28.4–30.7°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: July 29.5°C · September 29.8°C.
Okinawa - Blue Cave in September
Typical September water temperature near Okinawa - Blue Cave is 29.8°C (85.6°F), with yearly monthly means from 29.3–30.2°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: August 29.7°C · October 28.5°C.
Okinawa - Blue Cave in October
Typical October water temperature near Okinawa - Blue Cave is 28.5°C (83.3°F), with yearly monthly means from 27.8–29.4°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: September 29.8°C · November 26.3°C.
Okinawa - Blue Cave in November
Typical November water temperature near Okinawa - Blue Cave is 26.3°C (79.3°F), with yearly monthly means from 25.5–26.7°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: October 28.5°C · December 24.0°C.
Okinawa - Blue Cave in December
Typical December water temperature near Okinawa - Blue Cave is 24.0°C (75.2°F), with yearly monthly means from 23.8–24.3°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: November 26.3°C · January 22.2°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 | 26.2°C / 79.1°F | 28.2°C / 82.8°F |
| July | 26.9°C / 80.4°F | 28.7°C / 83.7°F | 30.7°C / 87.3°F |
| August | 26.9°C / 80.4°F | 28.6°C / 83.5°F | 30.9°C / 87.6°F |
| September | 28.1°C / 82.6°F | 28.9°C / 84.1°F | 29.8°C / 85.6°F |
| October | 26.8°C / 80.2°F | 28.1°C / 82.5°F | 29.5°C / 85.1°F |
| November | 26.3°C / 79.3°F | 26.6°C / 79.9°F | 27.1°C / 80.8°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3818 hourly forecast records across 6 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Okinawa - Blue Cave
Cape Maeda sea cave glowing blue, with reef fish in the clear entrance.
- Area
- Okinawa
Okinawa - Blue Cave Water Temperature: Common Questions
What is the water temperature in Okinawa - Blue Cave today?
The current sea surface temperature near Okinawa - Blue Cave is 26.6°C (79.9°F). Over the last 30 days, the average has been 27.6°C.
When is the water warmest in Okinawa - Blue Cave?
The water is typically warmest in September, at around 29.8°C (85.6°F) in the 2023–2025 historical baseline.
When is the water coldest in Okinawa - Blue Cave?
The water is typically coldest in March, at around 21.5°C (70.7°F) in the same historical baseline.
Can you swim in Okinawa - Blue Cave today?
At 26.6°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 Okinawa - Blue Cave.
View Snorkel Forecast →