Surf Forecasts:
How big are the waves at Tank Beach today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 3.5ft (1.0m), 12s period with ESE swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 4.5ft (1.4m), 11s period with ESE swell.
- Evening surf: Evening surf (21 Aug, local time) - 6ft (1.9m), 10s period with E swell.
The current surf forecast for Tank Beach at 3AM is: 0.7m 13s primary swell from a East-southeast direction and 1.3m 6s secondary swell from a Northeast direction (forecast issued at 09:00pm August 20). The wind direction is predicted to be cross-onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 3.5ft (1.0m) | 12s |
| Afternoon (21 Aug) | 4.5ft (1.4m) | 11s |
| Evening (21 Aug) | 6ft (1.9m) | 10s |
Table - waves today at Tank Beach. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 50mm), heaviest during Fri afternoon. Warm (max 29°C on Thu night, min 28°C on Fri night). Mainly strong winds. | ||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | ||||||||||||||||
7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||
Wave Height (m) Direction Period (s) | NE 7 | NE 6 | NE 6 | ESE 13 | ESE 12 | ESE 12 | ESE 11 | ESE 11 | ESE 10 | E 10 | ENE 11 | ENE 11 | NE 11 | NE 10 | NE 10 | NNE 10 | NNE 10 | N 10 |
Wave Graph  | ||||||||||||||||||
 kJ | 173 | 150 | 141 | 149 | 241 | 285 | 427 | 496 | 388 | 725 | 1344 | 1689 | 1403 | 1249 | 1006 | 1020 | 934 | 882 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | off |
High Tide | 11:58PM0.67m | 5:27PM0.61m | 00:34AM0.66m | 6:16PM0.63m | ||||||||||||||
Low Tide | 6:24PM0.58m | 8:28AM0.20m | 7:38PM0.61m | 9:20AM0.18m | 9:05PM0.62m | |||||||||||||
 | | |  |  |  |  | |  | | | | | | | | |  | |
 | — | — | — | 6:01 | — | — | — | — | — | — | — | 6:03 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:36 | — | — |
mm | 3 | 3 | 2 | — | — | — | 4 | 9 | 7 | 6 | 4 | 2 | 2 | 2 | 1 | 1 | 1 | — |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 29 | 29 | 28 |
Feels °C | 31 | 31 | 31 | 32 | 32 | 32 | 31 | 31 | 32 | 32 | 30 | 28 | 26 | 27 | 27 | 29 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | WSW 8 | NE 6 | NE 6 | NE 6 | NE 6 | ESE 11 | ESE 11 | ESE 10 | E 10 | ENE 11 | ENE 11 | NE 11 | NE 10 | NE 10 | NNE 10 | NNE 10 | N 10 |
| kJ | 58 | 57 | 141 | 141 | 113 | 113 | 427 | 496 | 388 | 725 | 1344 | 1689 | 1403 | 1249 | 1006 | 1020 | 934 | 882 |
Swell 2 Height (m) Direction Period (s) | W 9 | W 9 | WSW 8 | ESE 13 | ESE 12 | ESE 12 | NE 6 | NE 6 | ESE 14 | E 14 | E 15 | SE 10 | SE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 |
| kJ | 56 | 54 | 55 | 149 | 241 | 285 | 103 | 101 | 243 | 199 | 165 | 51 | 84 | 122 | 180 | 193 | 227 | 211 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 11 | W 8 | WSW 8 | WSW 8 | W 8 | W 10 | W 9 | W 9 | NE 8 | WSW 8 | — | — | — | NW 5 | E 13 | WNW 9 | WNW 9 |
| kJ | 21 | 32 | 37 | 55 | 54 | 52 | 67 | 61 | 40 | 38 | 28 | — | — | — | 7 | 14 | 27 | 26 |
Wind waves Height (m) Direction Period (s) | NE 7 | NE 6 | — | — | — | — | — | — | NNE 6 | W 9 | W 8 | W 8 | W 4 | W 5 | W 5 | WSW 5 | WSW 5 | WSW 5 |
| kJ | 173 | 150 | — | — | — | — | — | — | 65 | 14 | 37 | 51 | 53 | 71 | 75 | 66 | 50 | 40 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 227 | 227 | 227 | 229 | 229 | 229 | 237 | 237 | 237 | 237 | 237 | 2214 | 2216 | 2219 | 2102 | 2219 | 2102 | 0 |
Best forecast wave conditions in Saipan | ||||||||||||||||||
Best forecast wave conditions in Northern Mariana Islands | ||||||||||||||||||
Header Global | ||||||||||||||||||
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