Surf Forecasts:
Tank Beach surf forecast from 18 Aug 2026:
- Best quality surf: Monday 24 Aug, 7AM (local time) - 4.5ft (1.4m), 9s period, NW swell with offshore winds.
- Most powerful swell: Sunday 23 Aug, 4AM (local time) - 6.5ft (2.0m), 7s period, NW swell with 347 kJ wave energy.
- Next surfable swell (1★+): Monday 24 Aug, 7AM (local time) - 4.5ft (1.4m), 9s period with NW swell.
Best Forecast Surf Conditions for Tank Beach this week:
The surf forecast for Tank Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 24) at 7AM. The primary swell is predicted to be 1.4m and 9s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Tank Beach in the next 16 days are 2.0m 7s and forecast to arrive on Sunday (Aug 23) at 4AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 7s period and expected on Sunday (Aug 23) at 7PM.
| Wave Type | Time (ChST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 24th Aug) | 4.5ft (1.4m) 9s |
| Best Surf | 7AM (Mon 24th Aug) | 4.5ft (1.4m) 9s |
| Most Powerful | 4AM (Sun 23rd Aug) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Tank Beach over the next 16 days.
Short Range ForecastHeavy rain (total 35mm), heaviest during Tue night. Warm (max 29°C on Tue night, min 28°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 58mm), heaviest during Sat morning. Warm (max 28°C on Fri night, min 27°C on Sat morning). Winds increasing (light winds from the N on Fri night, strong winds from the SW by Sat night). | ||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | NNE 8 | NE 8 | NE 8 | NE 6 | NE 6 | NE 6 | NE 7 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NW 6 | NE 8 | E 13 | NE 9 | WNW 8 | WNW 9 | WNW 10 |
Wave Graph  | |||||||||||||||||||
 kJ | 47 | 118 | 112 | 93 | 93 | 88 | 99 | 129 | 104 | 91 | 88 | 142 | 297 | 178 | 82 | 46 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | on | on | cross-on | on | cross-on | cross-on | cross | cross-off | off | off | off | off | off | cross-off | cross-off |
High Tide | 11:07PM0.70m | 2:04PM0.57m | 11:30PM0.68m | 4:00PM0.59m | 11:58PM0.67m | 5:27PM0.61m | 00:34AM0.66m | 6:16PM0.63m | 1:23AM0.66m | 6:50PM0.65m | 2:21AM0.66m | 7:19PM0.66m | |||||||
Low Tide | 6:43AM0.26m | 5:38PM0.54m | 7:35AM0.23m | 6:24PM0.58m | 8:28AM0.20m | 7:38PM0.61m | 9:20AM0.18m | 9:05PM0.62m | 10:10AM0.15m | 10:14PM0.62m | 10:55AM0.14m | 11:06PM0.61m | |||||||
 |  |  | | | | | | | | | | |  | | | | |  | |
 | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | — | 6:37 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:36 | — | — | 6:35 | — |
mm | 13 | 2 | — | 4 | 5 | 3 | 4 | 1 | 3 | 12 | 12 | 5 | 7 | — | 1 | 7 | 4 | 10 | 6 |
Temp °C | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 |
Feels °C | 33 | 31 | 32 | 32 | 32 | 32 | 33 | 33 | 32 | 30 | 28 | 26 | 26 | 26 | 27 | 27 | 29 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 8 | W 9 | W 8 | W 9 | NE 6 | NE 7 | NE 9 | NE 9 | NE 9 | NE 9 | NE 8 | NE 8 | NE 8 | SSE 9 | WNW 8 | WNW 8 | WNW 9 | WNW 10 |
| kJ | 163 | 171 | 145 | 112 | 152 | 88 | 99 | 129 | 104 | 91 | 88 | 142 | 238 | 178 | 161 | 330 | 230 | 280 | 314 |
Swell 2 Height (m) Direction Period (s) | NNE 8 | E 9 | SE 10 | SE 10 | SE 9 | WSW 9 | WSW 8 | WSW 8 | W 9 | W 9 | E 7 | E 8 | SSE 9 | NNW 7 | NNE 9 | SSE 9 | S 9 | S 9 | SW 9 |
| kJ | 47 | 14 | 35 | 47 | 43 | 79 | 73 | 55 | 60 | 55 | 48 | 134 | 90 | 68 | 68 | 211 | 203 | 159 | 156 |
Swell 3 Height (m) Direction Period (s) | E 9 | SE 9 | E 9 | E 9 | E 9 | W 9 | W 8 | W 10 | WSW 9 | WSW 8 | SSE 10 | SE 9 | SW 8 | SSE 9 | E 13 | NE 9 | WSW 6 | SW 8 | SE 9 |
| kJ | 25 | 21 | 14 | 14 | 14 | 78 | 52 | 68 | 42 | 37 | 61 | 88 | 15 | 94 | 82 | 46 | 22 | 44 | 88 |
Wind waves Height (m) Direction Period (s) | ENE 3 | NE 8 | NE 8 | NE 6 | NE 6 | — | — | — | — | — | NW 3 | NNW 4 | NW 6 | W 6 | W 7 | SW 7 | — | SSW 2 | — |
| kJ | 1 | 118 | 112 | 93 | 93 | — | — | — | — | — | 2 | 26 | 297 | 143 | 277 | 75 | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 2216 | 237 | 2102 | 2246 | 249 | 1504 | 2231 | 249 | 242 | 237 | 237 | 237 | 2216 | 2262 | 2102 | 2102 | 2056 | 2056 | 2075 |
Best forecast wave conditions in Saipan | |||||||||||||||||||
Best forecast wave conditions in Northern Mariana Islands | |||||||||||||||||||
Header Global | |||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Tank Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Tank Beach Surf forecast
The above surf forecast table for Tank Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tank Beach can be found by selecting the local surf guide option on the grey menu. Our Tank Beach surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Tank Beach) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Tank Beach may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Tank Beach is 19 km (12 miles) from Saipan. If you plan a holiday in Saipan, look for hotels and other accommodation in Saipan. Saipan has rooms for a wide range of budgets as well as car hire and transport links.
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