MARINE REPORT / 72 HOURS

Mnemba Atoll Snorkel Report Today

Tanzania · Updated Sat 13:10 (EAT) · Source: Snapshot

The skinny

Marginal Data updated Sat 13:10 (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 · 3.5/10

Sat 16:00 (EAT)

Later today

Fair · 3.8/10

Sat 18:00 (EAT)

Next three days

Fair · 5.0/10

Tue 08:00 (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: 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 6.2 m/s.

Email me when it is good

Sunrise

06:00

Sunset

18:15

Water

27.3°C

Max air

26.9°C

Sky

Clear

16% 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

  • Tue 08:00: Fair (0.50) · still limited by waves, tide/current
  • Tue 07:00: Fair (0.48) · still limited by waves, tide/current
  • Tue 06:00: Fair (0.45) · 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, Tue 11:00

Nearby alternatives in Tanzania

Mafia Island

238 km away

❌ Poor

Advanced forecast data

Viewing historical data

Mon 16:00 – Thu 16:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.39 around Tue 07:00; 1 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 1.16m to 1.3m).

Wind is at or below 5.4m/s in 19/24 sampled hours (range 2.17 to 7.18m/s).

Tides range from -0.16m to 1.37m; 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
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
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
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
Poor ❌ Limited
Poor ❌ Limited
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
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
Mon 16:00 1.26 · high 5.27 · good 27.30 · good Poor
Mon 17:00 1.28 · high 5.86 · high 27.20 · good Poor
Mon 18:00 1.28 · high 5.15 · good 27.20 · good Poor
Mon 19:00 1.26 · high 5.54 · high 27.10 · good Poor
Mon 20:00 1.22 · high 5.10 · good 27.10 · good Poor
Mon 21:00 1.30 · high 5.29 · good 27.10 · good Poor
Mon 22:00 1.28 · high 5.30 · good 27.10 · good Poor
Mon 23:00 1.26 · high 4.54 · good 27.00 · good Poor
Tue 00:00 1.24 · high 4.15 · good 27.00 · good Poor
Tue 01:00 1.22 · high 3.61 · good 27.00 · good Poor
Tue 02:00 1.22 · high 3.37 · good 27.00 · good Poor
Tue 03:00 1.20 · high 3.27 · good 27.00 · good Poor
Tue 04:00 1.18 · high 2.17 · good 27.00 · good Poor
Tue 05:00 1.18 · high 2.94 · good 27.00 · good Poor
Tue 06:00 1.16 · high 2.75 · good 27.00 · good Poor
Tue 07:00 1.16 · high 3.24 · good 27.00 · good Fair
Tue 08:00 1.16 · high 3.73 · good 27.00 · good Poor
Tue 09:00 1.16 · high 4.29 · good 27.00 · good Poor
Tue 10:00 1.16 · high 5.13 · good 27.10 · good Poor
Tue 11:00 1.18 · high 5.41 · high 27.20 · good Poor
Tue 12:00 1.18 · high 3.92 · good 27.20 · good Poor
Tue 13:00 1.18 · high 4.70 · good 27.30 · good Poor
Tue 14:00 1.18 · high 6.88 · high 27.30 · good Poor
Tue 15:00 1.18 · high 7.18 · high 27.30 · good Poor
Tue 16:00 1.20 · high 7.20 · high 27.30 · good Poor
Tue 17:00 1.20 · high 7.25 · high 27.30 · good Poor
Tue 18:00 1.22 · high 6.74 · high 27.30 · good Poor
Tue 19:00 1.24 · high 6.04 · high 27.20 · good Poor
Tue 20:00 1.38 · high 6.01 · high 27.20 · good Poor
Tue 21:00 1.40 · high 5.85 · high 27.10 · good Poor
Tue 22:00 1.40 · high 5.69 · high 27.10 · good Poor
Tue 23:00 1.38 · high 5.56 · high 27.10 · good Poor
Wed 00:00 1.38 · high 5.47 · high 27.10 · good Poor
Wed 01:00 1.38 · high 5.02 · good 27.00 · good Poor
Wed 02:00 1.36 · high 5.39 · good 27.00 · good Poor
Wed 03:00 1.36 · high 5.44 · high 27.00 · good Poor
Wed 04:00 1.36 · high 5.20 · good 27.00 · good Poor
Wed 05:00 1.36 · high 4.88 · good 27.00 · good Poor
Wed 06:00 1.36 · high 4.89 · good 27.00 · good Poor
Wed 07:00 1.36 · high 5.28 · good 27.00 · good Poor
Wed 08:00 1.34 · high 5.91 · high 27.00 · good Fair
Wed 09:00 1.34 · high 5.66 · high 27.00 · good Fair
Wed 10:00 1.32 · high 5.37 · good 27.10 · good Fair
Wed 11:00 1.32 · high 5.22 · good 27.10 · good Fair
Wed 12:00 1.30 · high 5.11 · good 27.10 · good Fair
Wed 13:00 1.30 · high 5.13 · good 27.20 · good Fair
Wed 14:00 1.26 · high 4.76 · good 27.30 · good Fair
Wed 15:00 1.26 · high 5.29 · good 27.30 · good Fair
Wed 16:00 1.26 · high 5.52 · high 27.30 · good Fair
Wed 17:00 1.26 · high 5.59 · high 27.30 · good Fair
Wed 18:00 1.26 · high 5.76 · high 27.20 · good Poor
Wed 19:00 1.22 · high 5.89 · high 27.20 · good Poor
Wed 20:00 1.20 · high 5.69 · high 27.20 · good Poor
Wed 21:00 1.20 · high 5.49 · high 27.10 · good Poor
Wed 22:00 1.20 · high 5.16 · good 27.10 · good Poor
Wed 23:00 1.18 · high 4.70 · good 27.10 · good Poor
Thu 00:00 1.18 · high 4.51 · good 27.10 · good Poor
Thu 01:00 1.18 · high 4.27 · good 27.00 · good Poor
Thu 02:00 1.16 · high 3.75 · good 27.00 · good Poor
Thu 03:00 1.16 · high 3.32 · good 27.00 · good Poor
Thu 04:00 1.14 · high 3.40 · good 27.00 · good Poor
Thu 05:00 1.12 · high 3.51 · good 27.00 · good Poor
Thu 06:00 1.10 · high 3.51 · good 27.00 · good Poor
Thu 07:00 1.10 · high 3.93 · good 27.00 · good Poor
Thu 08:00 1.08 · high 4.06 · good 27.00 · good Fair
Thu 09:00 1.08 · high 4.15 · good 27.10 · good Fair
Thu 10:00 1.08 · high 3.64 · good 27.10 · good Fair
Thu 11:00 1.08 · high 3.89 · good 27.20 · good Fair
Thu 12:00 1.08 · high 4.23 · good 27.30 · good Fair
Thu 13:00 1.08 · high 4.83 · good 27.30 · good Fair
Thu 14:00 1.04 · high 5.58 · high 27.40 · good Poor
Thu 15:00 1.04 · high 5.63 · high 27.50 · good Poor