MARINE REPORT / 72 HOURS

Mnemba Atoll Snorkel Report Today

Tanzania · Updated Sat 23:26 (EAT) · Source: Snapshot

The skinny

Marginal Data updated Sat 23:26 (EAT)

Mnemba Atoll looks marginal today. The least-bad daylight window is around Sun 06:00, but waves is limiting the forecast.

Right now (forecast)

Poor · 0.0/10

Sun 00:00 (EAT)

Later today

Fair · 3.8/10

Sun 06:00 (EAT)

Next three days

Fair · 4.7/10

Tue 06:00 (EAT)

Model estimates using Open-Meteo; not observations or safety guarantees. Check official advisories and conditions at the beach.

Score: 3.8/10

Best time: Sun 06:00

Main risk: Waves

Best morning signal: Sun 06:00 (Fair).

Best afternoon signal: Sun 12:00 (Poor). Peak afternoon wind is about 6.4 m/s.

Email me when it is good

Sunrise

06:00

Sunset

18:15

Water

27.0°C

Max air

29.0°C

Sky

Cloudy

96% cloud

No good model window in the next 72 hours

Use the best-available section for the least-bad times.

3-day planner Best available Show data

3-day planner

Sunday

⚠️ Fair conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Tuesday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

  • Tue 06:00: Fair (0.47) · still limited by waves, tide/current
  • Tue 07:00: Fair (0.46) · still limited by waves, tide/current
  • Mon 11:00: Fair (0.46) · still limited by waves, tide/current

Why this verdict

Main blockers across the next 72 hours:

  • Waves (70 hours)
  • Tide/current (70 hours)
  • Darkness (31 hours)

Jellyfish drift risk

Drift estimate from wind, swell, current and warm water.

Low · 34/100

Low drift risk now.

warm water supports seasonal jellyfish activity; surface drift/current is noticeable; local shoreline exposure is not mapped yet.

Sightings override the model: if you see small purple jellyfish with long trailing tentacles, treat them as sting-capable and give them space.

Upcoming high tides

Next early morning high tide: Sun 07:00

Sun 07:00, Sun 20:00, Mon 23:00, Tue 11:00

Nearby alternatives in Tanzania

Mafia Island

238 km away

❌ Poor

Advanced forecast data

Viewing historical data

Thu 00:00 – Sun 00:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.38 around Thu 09:00; 7 of 24 hours are good, fair, or excellent.

Score trend, higher is better. Excellent ≥ 0.72, good 0.55–0.72, fair 0.35–0.55.

Conditions (24h trends)

Tap a chart to load just that series.

0/24 sampled hours stay at or below 0.36m (range 1.14m to 1.2m).

Wind is at or below 5.4m/s in 18/24 sampled hours (range 2.92 to 6.65m/s).

Tides range from -1.0m to 2.13m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Scoring methodology (for technical users)

We score each hour from 0 to 1 using daylight and these weighted components:

  • Wave height (35%): best below 0.36m, then decreases as it rises.
  • Wind speed (25%): best below 5.4m/s, lower is better.
  • Sea surface temperature (15%): best within 20.6°C to 30.4°C.
  • Tide and currents (15%): best around slack/high-tide windows.
  • Daylight (10%): visibility is better in daylight, so night hours score lower.
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Thu 00:00 1.18 · high 3.53 · good 26.90 · good Poor
Thu 01:00 1.18 · high 3.08 · good 26.90 · good Poor
Thu 02:00 1.16 · high 2.92 · good 26.90 · good Poor
Thu 03:00 1.16 · high 3.18 · good 26.90 · good Poor
Thu 04:00 1.16 · high 3.40 · good 26.90 · good Poor
Thu 05:00 1.14 · high 3.25 · good 26.90 · good Poor
Thu 06:00 1.14 · high 3.20 · good 26.80 · good Poor
Thu 07:00 1.14 · high 3.41 · good 26.80 · good Poor
Thu 08:00 1.14 · high 3.67 · good 26.80 · good Poor
Thu 09:00 1.14 · high 4.58 · good 26.90 · good Fair
Thu 10:00 1.14 · high 4.78 · good 26.90 · good Fair
Thu 11:00 1.16 · high 5.28 · good 27.00 · good Fair
Thu 12:00 1.16 · high 5.42 · high 27.10 · good Fair
Thu 13:00 1.16 · high 5.72 · high 27.20 · good Poor
Thu 14:00 1.20 · high 5.76 · high 27.20 · good Poor
Thu 15:00 1.20 · high 6.65 · high 27.20 · good Poor
Thu 16:00 1.20 · high 6.30 · high 27.20 · good Fair
Thu 17:00 1.20 · high 5.59 · high 27.20 · good Fair
Thu 18:00 1.20 · high 5.36 · good 27.10 · good Fair
Thu 19:00 1.18 · high 4.94 · good 27.10 · good Poor
Thu 20:00 1.20 · high 4.72 · good 27.10 · good Poor
Thu 21:00 1.20 · high 4.60 · good 27.00 · good Poor
Thu 22:00 1.18 · high 4.32 · good 27.00 · good Poor
Thu 23:00 1.18 · high 3.93 · good 27.00 · good Poor
Fri 00:00 1.16 · high 4.01 · good 27.00 · good Poor
Fri 01:00 1.14 · high 3.67 · good 27.00 · good Poor
Fri 02:00 1.14 · high 3.33 · good 27.00 · good Poor
Fri 03:00 1.12 · high 2.58 · good 27.00 · good Poor
Fri 04:00 1.12 · high 2.42 · good 27.00 · good Poor
Fri 05:00 1.10 · high 2.56 · good 27.00 · good Poor
Fri 06:00 1.10 · high 2.97 · good 26.90 · good Poor
Fri 07:00 1.08 · high 3.08 · good 26.90 · good Fair
Fri 08:00 1.08 · high 3.59 · good 27.00 · good Fair
Fri 09:00 1.06 · high 2.71 · good 27.00 · good Fair
Fri 10:00 1.06 · high 2.62 · good 27.00 · good Fair
Fri 11:00 1.04 · high 2.89 · good 27.10 · good Fair
Fri 12:00 1.04 · high 3.62 · good 27.20 · good Fair
Fri 13:00 1.04 · high 3.97 · good 27.30 · good Fair
Fri 14:00 1.04 · high 4.29 · good 27.50 · good Fair
Fri 15:00 1.04 · high 5.61 · high 27.50 · good Fair
Fri 16:00 1.06 · high 5.99 · high 27.50 · good Fair
Fri 17:00 1.06 · high 6.27 · high 27.50 · good Fair
Fri 18:00 1.08 · high 5.98 · high 27.40 · good Fair
Fri 19:00 1.10 · high 5.17 · good 27.30 · good Poor
Fri 20:00 1.10 · high 5.02 · good 27.20 · good Poor
Fri 21:00 1.08 · high 4.65 · good 27.20 · good Poor
Fri 22:00 1.10 · high 4.53 · good 27.10 · good Poor
Fri 23:00 1.10 · high 4.00 · good 27.10 · good Poor
Sat 00:00 1.12 · high 3.81 · good 27.10 · good Poor
Sat 01:00 1.12 · high 3.59 · good 27.10 · good Poor
Sat 02:00 1.12 · high 3.08 · good 27.00 · good Poor
Sat 03:00 1.12 · high 2.86 · good 27.00 · good Poor
Sat 04:00 1.12 · high 3.12 · good 27.00 · good Poor
Sat 05:00 1.12 · high 2.19 · good 27.00 · good Poor
Sat 06:00 1.12 · high 2.19 · good 27.00 · good Poor
Sat 07:00 1.12 · high 2.55 · good 27.00 · good Fair
Sat 08:00 1.14 · high 2.41 · good 27.00 · good Poor
Sat 09:00 1.14 · high 3.22 · good 27.00 · good Poor
Sat 10:00 1.14 · high 4.10 · good 27.10 · good Poor
Sat 11:00 1.16 · high 2.56 · good 27.20 · good Poor
Sat 12:00 1.16 · high 1.65 · good 27.30 · good Fair
Sat 13:00 1.18 · high 2.81 · good 27.40 · good Fair
Sat 14:00 1.20 · high 3.10 · good 27.50 · good Fair
Sat 15:00 1.20 · high 5.73 · high 27.50 · good Fair
Sat 16:00 1.22 · high 5.49 · high 27.50 · good Fair
Sat 17:00 1.26 · high 5.23 · good 27.50 · good Fair
Sat 18:00 1.28 · high 5.23 · good 27.40 · good Fair
Sat 19:00 1.20 · high 5.46 · high 27.30 · good Poor
Sat 20:00 1.20 · high 5.27 · good 27.30 · good Poor
Sat 21:00 1.20 · high 4.90 · good 27.20 · good Poor
Sat 22:00 1.20 · high 4.86 · good 27.20 · good Poor
Sat 23:00 1.18 · high 4.67 · good 27.20 · good Poor