MARINE REPORT / 72 HOURS

Mnemba Atoll Snorkel Report Today

Tanzania · Updated Sat 06:35 (EAT) · Source: Snapshot

The skinny

Marginal Data updated Sat 06:35 (EAT)

Mnemba Atoll looks marginal today. The least-bad daylight window is around Sat 08:00, but waves is limiting the forecast.

Right now (forecast)

Fair · 3.8/10

Sat 07:00 (EAT)

Later today

Fair · 4.2/10

Sat 08:00 (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: 4.2/10

Best time: Sat 08:00

Main risk: Waves

Best morning signal: Sat 08:00 (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

27.0°C

Max air

29.3°C

Sky

Clear

27% 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
  • Mon 07:00: Fair (0.45) · still limited by waves, tide/current
  • Mon 10:00: Fair (0.45) · 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

Thu 07:00 – Sun 07:00 (EAT)

Previous day Yesterday Next day Live

Snorkel Score (selected 24h)

Best snorkel score is 0.38 around Thu 10:00; 4 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 1.48m to 1.58m).

Wind is at or below 5.4m/s in 13/24 sampled hours (range 3.47 to 7.21m/s).

Tides range from -0.77m to 1.71m; 2 of 24 hours are in or near peak slack windows.

72-hour historical overview
Fair ⚠️ Fair
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
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
Fair ⚠️ Fair
Poor ❌ Limited
Fair ⚠️ Fair
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
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
Fair ⚠️ Fair
Fair ⚠️ Fair
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
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Poor ❌ Limited
Fair ⚠️ Fair
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 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
Thu 10:00 1.50 · high 4.72 · good 27.20 · good Fair
Thu 11:00 1.48 · high 5.22 · good 27.30 · good Fair
Thu 12:00 1.48 · high 5.83 · high 27.30 · good Poor
Thu 13:00 1.48 · high 6.12 · high 27.30 · good Poor
Thu 14:00 1.50 · high 6.23 · high 27.40 · good Poor
Thu 15:00 1.50 · high 5.95 · high 27.40 · good Poor
Thu 16:00 1.52 · high 6.73 · high 27.40 · good Poor
Thu 17:00 1.56 · high 7.11 · high 27.30 · good Poor
Thu 18:00 1.58 · high 7.21 · high 27.30 · good Poor
Thu 19:00 1.48 · high 6.66 · high 27.20 · good Poor
Thu 20:00 1.52 · high 6.33 · high 27.20 · good Poor
Thu 21:00 1.54 · high 6.15 · high 27.20 · good Poor
Thu 22:00 1.54 · high 5.76 · high 27.20 · good Poor
Thu 23:00 1.56 · high 5.20 · good 27.10 · good Poor
Fri 00:00 1.56 · high 4.92 · good 27.10 · good Poor
Fri 01:00 1.56 · high 4.43 · good 27.10 · good Poor
Fri 02:00 1.54 · high 4.02 · good 27.10 · good Poor
Fri 03:00 1.54 · high 3.98 · good 27.10 · good Poor
Fri 04:00 1.52 · high 3.69 · good 27.10 · good Poor
Fri 05:00 1.50 · high 3.47 · good 27.10 · good Poor
Fri 06:00 1.48 · high 3.74 · good 27.10 · good Poor
Fri 07:00 1.48 · high 3.43 · good 27.10 · good Fair
Fri 08:00 1.46 · high 3.49 · good 27.10 · good Fair
Fri 09:00 1.46 · high 4.26 · good 27.10 · good Poor
Fri 10:00 1.44 · high 4.18 · good 27.20 · good Fair
Fri 11:00 1.44 · high 5.06 · good 27.20 · good Poor
Fri 12:00 1.42 · high 5.10 · good 27.30 · good Poor
Fri 13:00 1.42 · high 4.62 · good 27.40 · good Fair
Fri 14:00 1.40 · high 5.11 · good 27.40 · good Poor
Fri 15:00 1.40 · high 5.99 · high 27.40 · good Poor
Fri 16:00 1.40 · high 6.42 · high 27.40 · good Poor
Fri 17:00 1.42 · high 6.45 · high 27.30 · good Poor
Fri 18:00 1.42 · high 6.19 · high 27.30 · good Fair
Fri 19:00 1.40 · high 5.85 · high 27.20 · good Poor
Fri 20:00 1.40 · high 4.73 · good 27.20 · good Poor
Fri 21:00 1.38 · high 5.31 · good 27.20 · good Poor
Fri 22:00 1.36 · high 5.41 · high 27.20 · good Poor
Fri 23:00 1.32 · high 5.02 · good 27.10 · good Poor
Sat 00:00 1.34 · high 4.29 · good 27.10 · good Poor
Sat 01:00 1.32 · high 3.89 · good 27.10 · good Poor
Sat 02:00 1.30 · high 3.70 · good 27.10 · good Poor
Sat 03:00 1.28 · high 3.69 · good 27.10 · good Poor
Sat 04:00 1.26 · high 4.18 · good 27.10 · good Poor
Sat 05:00 1.26 · high 3.76 · good 27.10 · good Poor
Sat 06:00 1.24 · high 4.05 · good 27.10 · good Fair
Sat 07:00 1.24 · high 3.77 · good 27.10 · good Fair
Sat 08:00 1.24 · high 4.50 · good 27.10 · good Poor
Sat 09:00 1.24 · high 3.86 · good 27.10 · good Poor
Sat 10:00 1.26 · high 3.59 · good 27.10 · good Fair
Sat 11:00 1.26 · high 4.00 · good 27.20 · good Fair
Sat 12:00 1.28 · high 4.41 · good 27.30 · good Fair
Sat 13:00 1.28 · high 5.55 · high 27.30 · good Poor
Sat 14:00 1.30 · high 6.02 · high 27.40 · good Poor
Sat 15:00 1.30 · high 6.47 · high 27.40 · good Poor
Sat 16:00 1.32 · high 6.44 · high 27.40 · good Poor
Sat 17:00 1.32 · high 5.85 · high 27.40 · good Poor
Sat 18:00 1.34 · high 5.83 · high 27.40 · good Poor
Sat 19:00 1.34 · high 5.52 · high 27.30 · good Poor
Sat 20:00 1.36 · high 5.16 · good 27.30 · good Poor
Sat 21:00 1.36 · high 4.57 · good 27.20 · good Poor
Sat 22:00 1.36 · high 5.28 · good 27.20 · good Poor
Sat 23:00 1.36 · high 4.96 · good 27.20 · good Poor
Sun 00:00 1.36 · high 4.67 · good 27.20 · good Poor
Sun 01:00 1.50 · high 4.15 · good 27.20 · good Poor
Sun 02:00 1.50 · high 4.07 · good 27.10 · good Poor
Sun 03:00 1.50 · high 4.11 · good 27.10 · good Poor
Sun 04:00 1.50 · high 3.82 · good 27.10 · good Poor
Sun 05:00 1.50 · high 3.51 · good 27.10 · good Poor
Sun 06:00 1.50 · high 3.03 · good 27.10 · good Fair