SnorkelForecast.com

Mnemba Atoll Snorkel Report Today

Tanzania · Updated Tue 03:13 (EAT) · Source: Snapshot · Showing fallback/stale data

The skinny

Marginal Report Wed 21:27

Mnemba Atoll looks marginal today. The least-bad daylight window is around Thu 18:00, but waves is limiting the forecast.

Score: 4.4/10

Best time: Thu 18:00

Main risk: Waves

No useful morning window is showing yet.

No useful afternoon window is showing yet.

Email me when it is good

Sunrise

06:34

Sunset

18:23

Water

25.8°C

Max air

24.3°C

Sky

Partly cloudy

47% cloud

No safe 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

Wednesday

❌ poor conditions

Main blocker: Waves

Thursday

⚠️ fair conditions

Main blocker: Waves

Friday

❌ poor conditions

Main blocker: Waves

Best available hours

  • Thu 15:00 — Fair (0.44) · still limited by waves, tide/current
  • Thu 14:00 — Fair (0.41) · still limited by waves, tide/current
  • Thu 13:00 — Fair (0.38) · still limited by waves, wind

Why this verdict

Main blockers across the next 72 hours:

  • Waves (32 hours)
  • Tide/current (32 hours)
  • Darkness (20 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

Thu 07:00, Thu 20:00

Nearby alternatives in Tanzania

Mafia Island

238 km away

❌ Poor

Advanced forecast data

Viewing historical data

Tue 18:00 – Fri 18:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.24 around Wed 16:00; 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 1.0m to 1.06m).

Wind is at or below 5.4m/s in 0/24 sampled hours (range 10.4 to 21.2m/s).

Tides range from -0.91m to 1.89m; 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 and safety gate (outside daylight scores lower).
Detailed hourly data table
Time Wave (m) Wind (m/s) Sea temp (°C) Status
Tue 18:00 1.00 · high 14.50 · high 26.30 · good poor
Tue 19:00 1.02 · high 13.50 · high 26.30 · good poor
Tue 20:00 1.04 · high 14.10 · high 26.30 · good poor
Tue 21:00 1.06 · high 13.50 · high 26.30 · good poor
Tue 22:00 1.06 · high 13.20 · high 26.30 · good poor
Tue 23:00 1.06 · high 14.20 · high 26.30 · good poor
Wed 00:00 1.06 · high 13.10 · high 26.30 · good poor
Wed 01:00 1.06 · high 10.80 · high 26.30 · good poor
Wed 02:00 1.04 · high 10.40 · high 26.30 · good poor
Wed 03:00 1.04 · high 11.70 · high 26.30 · good poor
Wed 04:00 1.04 · high 14.60 · high 26.30 · good poor
Wed 05:00 1.02 · high 15.50 · high 26.30 · good poor
Wed 06:00 1.02 · high 14.70 · high 26.30 · good poor
Wed 07:00 1.02 · high 15.50 · high 26.30 · good poor
Wed 08:00 1.02 · high 15.30 · high 26.30 · good poor
Wed 09:00 1.02 · high 16.10 · high 26.40 · good poor
Wed 10:00 1.02 · high 17.90 · high 26.40 · good poor
Wed 11:00 1.04 · high 19.40 · high 26.40 · good poor
Wed 12:00 1.04 · high 20.20 · high 26.40 · good poor
Wed 13:00 1.04 · high 20.70 · high 26.40 · good poor
Wed 14:00 1.02 · high 20.60 · high 26.40 · good poor
Wed 15:00 1.02 · high 19.60 · high 26.40 · good poor
Wed 16:00 1.02 · high 18.70 · high 26.40 · good poor
Wed 17:00 1.04 · high 21.20 · high 26.30 · good poor
Wed 18:00 1.04 · high 21.00 · high 26.30 · good poor
Wed 19:00 1.04 · high 18.00 · high 26.30 · good poor
Wed 20:00 1.02 · high 18.80 · high 26.30 · good poor
Wed 21:00 1.02 · high 19.10 · high 26.30 · good poor
Wed 22:00 1.00 · high 17.70 · high 26.30 · good poor
Wed 23:00 1.00 · high 14.40 · high 26.30 · good poor
Thu 00:00 0.98 · high 13.40 · high 26.30 · good poor
Thu 01:00 0.98 · high 11.20 · high 26.30 · good poor
Thu 02:00 0.98 · high 10.80 · high 26.30 · good poor
Thu 03:00 0.98 · high 10.80 · high 26.30 · good poor
Thu 04:00 0.98 · high 10.90 · high 26.30 · good poor
Thu 05:00 0.98 · high 12.70 · high 26.30 · good poor
Thu 06:00 0.98 · high 13.10 · high 26.30 · good poor
Thu 07:00 1.00 · high 13.90 · high 26.30 · good poor
Thu 08:00 1.00 · high 14.30 · high 26.40 · good poor
Thu 09:00 1.02 · high 13.20 · high 26.40 · good poor
Thu 10:00 1.04 · high 14.50 · high 26.40 · good poor
Thu 11:00 1.04 · high 16.70 · high 26.50 · good poor
Thu 12:00 1.06 · high 18.10 · high 26.50 · good poor
Thu 13:00 1.08 · high 17.90 · high 26.50 · good poor
Thu 14:00 1.10 · high 18.80 · high 26.50 · good poor
Thu 15:00 1.12 · high 17.80 · high 26.50 · good poor
Thu 16:00 1.14 · high 17.70 · high 26.40 · good poor
Thu 17:00 1.14 · high 17.70 · high 26.40 · good poor
Thu 18:00 1.16 · high 16.80 · high 26.40 · good poor
Thu 19:00 1.16 · high 17.80 · high 26.40 · good poor
Thu 20:00 1.18 · high 17.70 · high 26.40 · good poor
Thu 21:00 1.18 · high 16.90 · high 26.40 · good poor
Thu 22:00 1.18 · high 14.90 · high 26.40 · good poor
Thu 23:00 1.16 · high 14.50 · high 26.40 · good poor
Fri 00:00 1.16 · high 13.90 · high 26.40 · good poor
Fri 01:00 1.16 · high 11.70 · high 26.40 · good poor
Fri 02:00 1.14 · high 11.10 · high 26.40 · good poor
Fri 03:00 1.14 · high 9.20 · high 26.40 · good poor
Fri 04:00 1.14 · high 9.40 · high 26.40 · good poor
Fri 05:00 1.12 · high 11.20 · high 26.40 · good poor
Fri 06:00 1.12 · high 11.20 · high 26.40 · good poor
Fri 07:00 1.12 · high 11.70 · high 26.40 · good poor
Fri 08:00 1.14 · high 12.40 · high 26.50 · good poor
Fri 09:00 1.14 · high 13.60 · high 26.50 · good poor
Fri 10:00 0.90 · high 14.10 · high 25.70 · good poor
Fri 11:00 0.92 · high 15.30 · high 25.80 · good poor
Fri 12:00 0.92 · high 17.00 · high 25.80 · good poor
Fri 13:00 0.92 · high 19.10 · high 25.80 · good poor
Fri 14:00 0.94 · high 18.20 · high 25.80 · good poor
Fri 15:00 0.94 · high 14.50 · high 25.70 · good poor
Fri 16:00 0.94 · high 13.30 · high 25.70 · good poor
Fri 17:00 0.96 · high 13.70 · high 25.70 · good poor