Surf Forecasts:
How big are the waves at Tank Beach today (21 Sep):
- Afternoon surf: Afternoon surf (21 Sep, local time) - 3.5ft (1.1m), 10s period with NNW swell.
- Evening surf: Evening surf (21 Sep, local time) - 3.5ft (1.1m), 10s period with NNW swell.
The current surf forecast for Tank Beach at 12AM is: 1.1m 10s primary swell from a Northwest direction and 1.0m 10s secondary swell from a Northeast direction, 0.4m 3s secondary swell from a East-northeast direction (forecast issued at 03:00pm September 20). The wind direction is predicted to be onshore.
| Time (ChST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Sep) | - | - |
| Afternoon (21 Sep) | 3.5ft (1.1m) | 10s |
| Evening (21 Sep) | 3.5ft (1.1m) | 10s |
Table - waves today at Tank Beach. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 55mm), heaviest during Wed morning. Warm (max 29°C on Sun afternoon, min 26°C on Tue afternoon). Mainly fresh winds. | ||||||||||||||||||||
Sun 20 | Monday 21 | Tuesday 22 | ||||||||||||||||||
1 PM | 4 PM | 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) | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NE 12 | NE 12 | NE 11 | NE 11 | NE 11 | NE 11 | NE 10 | NW 10 | NW 10 | NW 10 | NW 10 | NE 10 | NW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 240 | 235 | 231 | 246 | 207 | 220 | 188 | 273 | 309 | 273 | 229 | 224 | 224 | 216 | 204 | 208 | 208 | 204 | 142 | 159 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross | cross | cross | cross | cross-off | cross-off | cross | cross | cross-off | cross-off | cross | cross |
High Tide | 5:13PM0.65m | 00:33AM0.62m | 5:45PM0.66m | 1:53AM0.62m | 6:10PM0.67m | |||||||||||||||
Low Tide | 9:25PM0.60m | 9:20AM0.19m | 10:18PM0.59m | 10:08AM0.19m | ||||||||||||||||
 |  |  | | | | | | | | |  | | | | | |  | |  | |
 | — | — | — | — | — | 6:05 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | 6:15 | — | — | — | — | — | — | — | 6:14 | — | — | — | — | — | — | — | 6:13 | — | — |
mm | — | 1 | 2 | 2 | 1 | 1 | 1 | 2 | — | — | 1 | — | 1 | 1 | — | 1 | 2 | 7 | 2 | — |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 27 | 26 | 28 | 27 |
Feels °C | 33 | 33 | 32 | 32 | 32 | 32 | 31 | 30 | 31 | 31 | 31 | 30 | 30 | 31 | 30 | 29 | 27 | 26 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NE 12 | NE 12 | NE 11 | NE 11 | NE 11 | NE 11 | NE 10 | NW 10 | NW 10 | NW 10 | NW 10 | NE 10 | NE 10 |
| kJ | 240 | 235 | 231 | 246 | 207 | 220 | 188 | 273 | 309 | 273 | 229 | 224 | 224 | 216 | 204 | 208 | 208 | 204 | 139 | 113 |
Swell 2 Height (m) Direction Period (s) | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NNW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 10 | NNW 10 | NE 10 | NE 10 | ENE 10 | NE 10 | NW 12 | NW 10 |
| kJ | 177 | 196 | 188 | 181 | 184 | 160 | 142 | 168 | 134 | 128 | 103 | 128 | 139 | 178 | 170 | 167 | 171 | 139 | 142 | 129 |
Swell 3 Height (m) Direction Period (s) | WSW 8 | WSW 8 | WSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | SW 8 | WSW 8 | WSW 8 | WSW 8 | WSW 7 | WSW 7 | WSW 7 | SW 7 | SW 7 | SW 7 | SW 7 | NW 10 | NW 12 |
| kJ | 84 | 84 | 82 | 62 | 62 | 60 | 60 | 60 | 39 | 37 | 37 | 37 | 36 | 34 | 24 | 23 | 23 | 23 | 98 | 159 |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 2 | ENE 3 | E 3 | E 3 | E 3 | ESE 4 | E 4 | ESE 4 | ESE 3 | ESE 3 | ESE 3 | ESE 3 | SE 4 | SSE 8 | SE 4 | SSE 6 | SSE 4 |
| kJ | — | — | — | 1 | 3 | 3 | 3 | 6 | 10 | 7 | 4 | 2 | 2 | 2 | 4 | 6 | 39 | 16 | 51 | 28 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 227 | 237 | 237 | 237 | 2213 | 227 | 252 | 233 | 229 | 227 | 227 | 227 | 227 | 2213 | 2056 | 2056 | 1491 | 1491 | 1491 | 1491 |
Best forecast wave conditions in Saipan | ||||||||||||||||||||
Best forecast wave conditions in Northern Mariana Islands | ||||||||||||||||||||
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