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 18:00, but waves is limiting the forecast.

Right now (forecast)

Fair · 3.9/10

Sat 12:00 (EAT)

Later today

Fair · 3.9/10

Sat 18:00 (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 18:00

Main risk: Waves

No useful morning window is showing yet.

Best afternoon signal: Sat 18:00 (Fair). Peak afternoon wind is about 6.3 m/s.

Email me when it is good

Sunrise

06:00

Sunset

18:15

Water

27.3°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 (68 hours)
  • Tide/current (68 hours)
  • Darkness (33 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

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

Fri 12:00 – Mon 12:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.35 around Sat 08:00; 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 1.1m to 1.28m).

Wind is at or below 5.4m/s in 16/24 sampled hours (range 2.78 to 6.16m/s).

Tides range from -1.16m to 2.29m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
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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
Fri 12:00 1.16 · high 4.69 · good 27.20 · good Poor
Fri 13:00 1.20 · high 5.15 · good 27.20 · good Poor
Fri 14:00 1.12 · high 5.90 · high 27.40 · good Poor
Fri 15:00 1.14 · high 5.68 · high 27.40 · good Poor
Fri 16:00 1.14 · high 5.87 · high 27.40 · good Poor
Fri 17:00 1.16 · high 6.16 · high 27.40 · good Poor
Fri 18:00 1.16 · high 5.85 · high 27.30 · good Poor
Fri 19:00 1.28 · high 5.74 · high 27.30 · good Poor
Fri 20:00 1.26 · high 5.27 · good 27.20 · good Poor
Fri 21:00 1.26 · high 5.45 · high 27.20 · good Poor
Fri 22:00 1.26 · high 5.84 · high 27.20 · good Poor
Fri 23:00 1.26 · high 4.99 · good 27.20 · good Poor
Sat 00:00 1.26 · high 5.17 · good 27.20 · good Poor
Sat 01:00 1.22 · high 4.97 · good 27.20 · good Poor
Sat 02:00 1.20 · high 3.40 · good 27.20 · good Poor
Sat 03:00 1.16 · high 4.49 · good 27.20 · good Poor
Sat 04:00 1.14 · high 2.78 · good 27.20 · good Poor
Sat 05:00 1.14 · high 4.12 · good 27.20 · good Poor
Sat 06:00 1.12 · high 4.44 · good 27.20 · good Poor
Sat 07:00 1.12 · high 3.87 · good 27.10 · good Poor
Sat 08:00 1.12 · high 4.27 · good 27.20 · good Poor
Sat 09:00 1.12 · high 4.02 · good 27.20 · good Poor
Sat 10:00 1.12 · high 4.64 · good 27.20 · good Poor
Sat 11:00 1.10 · high 4.96 · good 27.30 · good Poor
Sat 12:00 1.10 · high 4.23 · good 27.40 · good Poor
Sat 13:00 1.10 · high 4.71 · good 27.40 · good Poor
Sat 14:00 1.02 · high 5.04 · good 27.40 · good Poor
Sat 15:00 1.02 · high 4.79 · good 27.40 · good Poor
Sat 16:00 1.02 · high 5.78 · high 27.40 · good Poor
Sat 17:00 1.04 · high 6.26 · high 27.40 · good Poor
Sat 18:00 1.04 · high 5.08 · good 27.30 · good Fair
Sat 19:00 1.00 · high 4.50 · good 27.30 · good Poor
Sat 20:00 1.00 · high 4.81 · good 27.30 · good Poor
Sat 21:00 1.02 · high 4.63 · good 27.20 · good Poor
Sat 22:00 1.04 · high 4.35 · good 27.20 · good Poor
Sat 23:00 1.06 · high 4.53 · good 27.20 · good Poor
Sun 00:00 1.08 · high 4.30 · good 27.20 · good Poor
Sun 01:00 1.10 · high 4.74 · good 27.20 · good Poor
Sun 02:00 1.14 · high 4.81 · good 27.20 · good Poor
Sun 03:00 1.16 · high 4.36 · good 27.20 · good Poor
Sun 04:00 1.16 · high 3.93 · good 27.20 · good Poor
Sun 05:00 1.14 · high 3.69 · good 27.20 · good Poor
Sun 06:00 1.14 · high 3.70 · good 27.20 · good Poor
Sun 07:00 1.14 · high 4.07 · good 27.20 · good Fair
Sun 08:00 1.14 · high 4.92 · good 27.20 · good Poor
Sun 09:00 1.14 · high 6.12 · high 27.20 · good Poor
Sun 10:00 1.16 · high 5.95 · high 27.20 · good Poor
Sun 11:00 1.16 · high 5.55 · high 27.20 · good Fair
Sun 12:00 1.18 · high 5.70 · high 27.30 · good Fair
Sun 13:00 1.18 · high 6.09 · high 27.30 · good Fair
Sun 14:00 1.10 · high 6.30 · high 27.30 · good Poor
Sun 15:00 1.10 · high 6.78 · high 27.30 · good Poor
Sun 16:00 1.14 · high 6.93 · high 27.30 · good Poor
Sun 17:00 1.16 · high 7.22 · high 27.30 · good Poor
Sun 18:00 1.20 · high 6.44 · high 27.30 · good Poor
Sun 19:00 1.20 · high 6.47 · high 27.20 · good Poor
Sun 20:00 1.22 · high 6.51 · high 27.20 · good Poor
Sun 21:00 1.26 · high 6.16 · high 27.20 · good Poor
Sun 22:00 1.28 · high 6.10 · high 27.20 · good Poor
Sun 23:00 1.28 · high 5.45 · high 27.10 · good Poor
Mon 00:00 1.30 · high 5.06 · good 27.10 · good Poor
Mon 01:00 1.30 · high 4.63 · good 27.10 · good Poor
Mon 02:00 1.28 · high 4.52 · good 27.10 · good Poor
Mon 03:00 1.28 · high 3.47 · good 27.10 · good Poor
Mon 04:00 1.28 · high 3.98 · good 27.10 · good Poor
Mon 05:00 1.26 · high 4.08 · good 27.10 · good Poor
Mon 06:00 1.26 · high 4.42 · good 27.10 · good Poor
Mon 07:00 1.26 · high 4.36 · good 27.10 · good Poor
Mon 08:00 1.26 · high 4.73 · good 27.10 · good Poor
Mon 09:00 1.26 · high 5.80 · high 27.10 · good Poor
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