MARINE REPORT / 72 HOURS

Mnemba Atoll Snorkel Report Today

Tanzania · Updated Sat 09:43 (EAT) · Source: Snapshot

The skinny

Marginal Data updated Sat 09:43 (EAT)

Mnemba Atoll looks marginal today. The least-bad daylight window is around Sat 12:00, but waves is limiting the forecast.

Right now (forecast)

Fair · 4.0/10

Sat 10:00 (EAT)

Later today

Fair · 3.9/10

Sat 12:00 (EAT)

Next three days

Fair · 4.7/10

Mon 06:00 (EAT)

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

Score: 3.9/10

Best time: Sat 12:00

Main risk: Waves

Best morning signal: Sat 11:00 (Fair).

Best afternoon signal: Sat 12:00 (Fair). Peak afternoon wind is about 6.3 m/s.

Email me when it is good

Sunrise

06:00

Sunset

18:15

Water

27.1°C

Max air

29.3°C

Sky

Partly cloudy

48% 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

Saturday

⚠️ Fair conditions

Main blocker: Waves

Sunday

⚠️ Fair conditions

Main blocker: Waves

Monday

⚠️ Fair conditions

Main blocker: Waves

Best available hours

  • Mon 06:00: Fair (0.47) · still limited by waves, tide/current
  • Tue 06:00: Fair (0.46) · still limited by waves, tide/current
  • Tue 07:00: 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 (33 hours)

Jellyfish drift risk

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

Low · 34/100

Low peak drift risk around Sat 12:00.

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

Sat 19:00, Sun 07:00, Sun 20:00, Mon 09:00, Mon 23:00

Nearby alternatives in Tanzania

Mafia Island

238 km away

❌ Poor

Advanced forecast data

Viewing historical data

Mon 10:00 – Thu 10:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.31 around Mon 13:00; 0 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 1.24m to 1.32m).

Wind is at or below 5.4m/s in 13/24 sampled hours (range 3.05 to 7.79m/s).

Tides range from -1.2m to 2.28m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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Fair ⚠️ Fair
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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
Mon 10:00 1.26 · high 6.62 · high 27.20 · good Poor
Mon 11:00 1.24 · high 6.79 · high 27.20 · good Poor
Mon 12:00 1.24 · high 6.88 · high 27.20 · good Poor
Mon 13:00 1.26 · high 6.88 · high 27.30 · good Poor
Mon 14:00 1.28 · high 6.88 · high 27.30 · good Poor
Mon 15:00 1.30 · high 7.79 · high 27.40 · good Poor
Mon 16:00 1.30 · high 7.39 · high 27.40 · good Poor
Mon 17:00 1.32 · high 7.47 · high 27.30 · good Poor
Mon 18:00 1.32 · high 6.97 · high 27.30 · good Poor
Mon 19:00 1.26 · high 5.69 · high 27.20 · good Poor
Mon 20:00 1.28 · high 5.38 · good 27.20 · good Poor
Mon 21:00 1.28 · high 5.43 · high 27.20 · good Poor
Mon 22:00 1.28 · high 5.30 · good 27.20 · good Poor
Mon 23:00 1.26 · high 5.15 · good 27.10 · good Poor
Tue 00:00 1.26 · high 4.47 · good 27.10 · good Poor
Tue 01:00 1.26 · high 3.91 · good 27.10 · good Poor
Tue 02:00 1.28 · high 3.93 · good 27.10 · good Poor
Tue 03:00 1.28 · high 3.86 · good 27.10 · good Poor
Tue 04:00 1.28 · high 3.55 · good 27.10 · good Poor
Tue 05:00 1.28 · high 3.09 · good 27.10 · good Poor
Tue 06:00 1.28 · high 3.05 · good 27.10 · good Poor
Tue 07:00 1.28 · high 3.35 · good 27.10 · good Poor
Tue 08:00 1.28 · high 3.46 · good 27.10 · good Poor
Tue 09:00 1.28 · high 3.43 · good 27.10 · good Poor
Tue 10:00 1.28 · high 4.30 · good 27.20 · good Poor
Tue 11:00 1.28 · high 4.64 · good 27.20 · good Poor
Tue 12:00 1.28 · high 4.99 · good 27.20 · good Poor
Tue 13:00 1.30 · high 5.15 · good 27.30 · good Poor
Tue 14:00 1.36 · high 5.95 · high 27.50 · good Poor
Tue 15:00 1.36 · high 6.66 · high 27.50 · good Poor
Tue 16:00 1.36 · high 6.39 · high 27.50 · good Poor
Tue 17:00 1.38 · high 6.76 · high 27.50 · good Poor
Tue 18:00 1.38 · high 6.45 · high 27.40 · good Poor
Tue 19:00 1.38 · high 5.56 · high 27.30 · good Poor
Tue 20:00 1.36 · high 5.27 · good 27.30 · good Poor
Tue 21:00 1.36 · high 5.37 · good 27.20 · good Poor
Tue 22:00 1.34 · high 4.99 · good 27.20 · good Poor
Tue 23:00 1.34 · high 5.01 · good 27.20 · good Poor
Wed 00:00 1.32 · high 4.58 · good 27.20 · good Poor
Wed 01:00 1.32 · high 4.00 · good 27.20 · good Poor
Wed 02:00 1.30 · high 3.95 · good 27.20 · good Poor
Wed 03:00 1.30 · high 3.07 · good 27.20 · good Poor
Wed 04:00 1.30 · high 2.86 · good 27.20 · good Poor
Wed 05:00 1.32 · high 2.30 · good 27.20 · good Poor
Wed 06:00 1.32 · high 1.56 · good 27.20 · good Poor
Wed 07:00 1.34 · high 2.81 · good 27.20 · good Poor
Wed 08:00 1.34 · high 2.26 · good 27.20 · good Poor
Wed 09:00 1.36 · high 3.97 · good 27.20 · good Poor
Wed 10:00 1.38 · high 4.04 · good 27.20 · good Poor
Wed 11:00 1.38 · high 4.86 · good 27.20 · good Poor
Wed 12:00 1.40 · high 5.84 · high 27.30 · good Poor
Wed 13:00 1.42 · high 5.33 · good 27.30 · good Poor
Wed 14:00 1.42 · high 4.81 · good 27.40 · good Poor
Wed 15:00 1.40 · high 6.58 · high 27.50 · good Poor
Wed 16:00 1.42 · high 6.55 · high 27.50 · good Poor
Wed 17:00 1.42 · high 6.43 · high 27.40 · good Poor
Wed 18:00 1.42 · high 6.86 · high 27.40 · good Poor
Wed 19:00 1.46 · high 6.58 · high 27.30 · good Poor
Wed 20:00 1.48 · high 6.33 · high 27.30 · good Poor
Wed 21:00 1.52 · high 6.17 · high 27.30 · good Poor
Wed 22:00 1.54 · high 6.19 · high 27.30 · good Poor
Wed 23:00 1.54 · high 6.21 · high 27.20 · good Poor
Thu 00:00 1.56 · high 5.75 · high 27.20 · good Poor
Thu 01:00 1.56 · high 5.23 · good 27.20 · good Poor
Thu 02:00 1.54 · high 5.19 · good 27.20 · good Poor
Thu 03:00 1.54 · high 3.97 · good 27.20 · good Poor
Thu 04:00 1.54 · high 3.94 · good 27.20 · good Poor
Thu 05:00 1.52 · high 3.82 · good 27.20 · good Poor
Thu 06:00 1.52 · high 3.63 · good 27.20 · good Poor
Thu 07:00 1.52 · high 3.99 · good 27.20 · good Fair
Thu 08:00 1.50 · high 4.43 · good 27.20 · good Poor
Thu 09:00 1.50 · high 4.67 · good 27.20 · good Fair