INSTRUMENT / SEA TEMPERATURE
Mnemba Atoll Water Temperature
Updated Mon 13:52 (Africa/Dar_es_Salaam)
Tanzania · Forecast updated Nov 9, 2026, 13:52 UTC
Current Sea Temperature
28.8°C
83.8°F
Very warm water
Valid Nov 9, 2026, 13:52 (Africa/Dar_es_Salaam). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
0.5°C above
The typical November average is 28.3°C (82.9°F) from the historical baseline.
Recent trend
Warming by 0.4°C
Seven-day average: 28.2°C, versus 27.8°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 Mnemba Atoll, typical monthly averages range from about 26.0°C (78.8°F) in August to 29.6°C (85.3°F) in March.
Over the past 30 days, the average sea temperature in Mnemba Atoll has been 27.6°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Mnemba Atoll, calculated from hourly observations for 2022–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 28.4–29.2°C | 28.8°C / 83.8°F |
| February | 28.6–29.9°C | 29.2°C / 84.6°F |
| March | 28.7–30.5°C | 29.6°C / 85.3°F |
| April | 29.1–29.6°C | 29.3°C / 84.7°F |
| May | 28.5–28.6°C | 28.6°C / 83.5°F |
| June | 27.6–27.8°C | 27.7°C / 81.9°F |
| July | 26.2–26.9°C | 26.5°C / 79.7°F |
| August | 25.7–26.4°C | 26.0°C / 78.8°F |
| September | 26.1–26.5°C | 26.3°C / 79.3°F |
| October | 26.6–27.4°C | 27.0°C / 80.6°F |
| November | 27.9–28.5°C | 28.3°C / 82.9°F |
| December | 28.5–29.4°C | 29.0°C / 84.2°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-5.79, 39.46). 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 2022–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Mnemba Atoll in January
Typical January water temperature near Mnemba Atoll is 28.8°C (83.8°F), with yearly monthly means from 28.4–29.2°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: December 29.0°C · February 29.2°C.
Explore Mnemba Atoll sea temperature in January, including swim comfort and month comparisons →
Mnemba Atoll in February
Typical February water temperature near Mnemba Atoll is 29.2°C (84.6°F), with yearly monthly means from 28.6–29.9°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: January 28.8°C · March 29.6°C.
Explore Mnemba Atoll sea temperature in February, including swim comfort and month comparisons →
Mnemba Atoll in March
Typical March water temperature near Mnemba Atoll is 29.6°C (85.3°F), with yearly monthly means from 28.7–30.5°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: February 29.2°C · April 29.3°C.
Explore Mnemba Atoll sea temperature in March, including swim comfort and month comparisons →
Mnemba Atoll in April
Typical April water temperature near Mnemba Atoll is 29.3°C (84.7°F), with yearly monthly means from 29.1–29.6°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: March 29.6°C · May 28.6°C.
Explore Mnemba Atoll sea temperature in April, including swim comfort and month comparisons →
Mnemba Atoll in May
Typical May water temperature near Mnemba Atoll is 28.6°C (83.5°F), with yearly monthly means from 28.5–28.6°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: April 29.3°C · June 27.7°C.
Explore Mnemba Atoll sea temperature in May, including swim comfort and month comparisons →
Mnemba Atoll in June
Typical June water temperature near Mnemba Atoll is 27.7°C (81.9°F), with yearly monthly means from 27.6–27.8°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: May 28.6°C · July 26.5°C.
Explore Mnemba Atoll sea temperature in June, including swim comfort and month comparisons →
Mnemba Atoll in July
Typical July water temperature near Mnemba Atoll is 26.5°C (79.7°F), with yearly monthly means from 26.2–26.9°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: June 27.7°C · August 26.0°C.
Explore Mnemba Atoll sea temperature in July, including swim comfort and month comparisons →
Mnemba Atoll in August
Typical August water temperature near Mnemba Atoll is 26.0°C (78.8°F), with yearly monthly means from 25.7–26.4°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: July 26.5°C · September 26.3°C.
Explore Mnemba Atoll sea temperature in August, including swim comfort and month comparisons →
Mnemba Atoll in September
Typical September water temperature near Mnemba Atoll is 26.3°C (79.3°F), with yearly monthly means from 26.1–26.5°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: August 26.0°C · October 27.0°C.
Explore Mnemba Atoll sea temperature in September, including swim comfort and month comparisons →
Mnemba Atoll in October
Typical October water temperature near Mnemba Atoll is 27.0°C (80.6°F), with yearly monthly means from 26.6–27.4°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: September 26.3°C · November 28.3°C.
Explore Mnemba Atoll sea temperature in October, including swim comfort and month comparisons →
Mnemba Atoll in November
Typical November water temperature near Mnemba Atoll is 28.3°C (82.9°F), with yearly monthly means from 27.9–28.5°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: October 27.0°C · December 29.0°C.
Explore Mnemba Atoll sea temperature in November, including swim comfort and month comparisons →
Mnemba Atoll in December
Typical December water temperature near Mnemba Atoll is 29.0°C (84.2°F), with yearly monthly means from 28.5–29.4°C.
Swimming and snorkeling: very warm water. Swimwear is usually enough; a rash guard adds sun protection.
Adjacent months: November 28.3°C · January 28.8°C.
Explore Mnemba Atoll sea temperature in December, including swim comfort and month comparisons →
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 | 25.8°C / 78.4°F | 27.3°C / 81.2°F | 28.2°C / 82.8°F |
| July | 24.8°C / 76.6°F | 26.0°C / 78.9°F | 26.7°C / 80.1°F |
| August | 25.9°C / 78.6°F | 26.1°C / 79.0°F | 26.6°C / 79.9°F |
| September | 26.0°C / 78.8°F | 26.5°C / 79.7°F | 27.2°C / 81.0°F |
| October | 26.8°C / 80.2°F | 27.3°C / 81.2°F | 28.5°C / 83.3°F |
| November | 27.7°C / 81.9°F | 28.2°C / 82.8°F | 29.0°C / 84.2°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3886 hourly forecast records across 6 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Mnemba Atoll
Zanzibar atoll with a protected reef, turtles and dolphins in clear water.
- Area
- Zanzibar
Mnemba Atoll Water Temperature: Common Questions
What is the water temperature in Mnemba Atoll today?
The current sea surface temperature near Mnemba Atoll is 28.8°C (83.8°F). Over the last 30 days, the average has been 27.6°C.
When is the water warmest in Mnemba Atoll?
The water is typically warmest in March, at around 29.6°C (85.3°F) in the 2022–2025 historical baseline.
When is the water coldest in Mnemba Atoll?
The water is typically coldest in August, at around 26.0°C (78.8°F) in the same historical baseline.
Can you swim in Mnemba Atoll today?
At 28.8°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 Mnemba Atoll.
View Snorkel Forecast →