Surf Forecasts:
Waimanu Bay surf forecast from 12 Aug 2026:
- Best quality surf: Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 10s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 13ft (4.0m), 11s period, ENE swell with 3,882 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 2AM (local time) - 13ft (4.0m), 10s period with ENE swell.
Best Forecast Surf Conditions for Waimanu Bay this week:
The surf forecast for Waimanu Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 2AM. The primary swell is predicted to be 4.0m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Waimanu Bay in the next 16 days are 4.0m 11s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 11s period and expected on Wednesday (Aug 12) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 16th Aug) | 13ft (4.0m) 10s |
| Best Surf | 2AM (Sun 16th Aug) | 13ft (4.0m) 10s |
| Most Powerful | 5AM (Sun 16th Aug) | 13ft (4.0m) 11s |
Table - best surf conditions forecast for Waimanu Bay over the next 16 days.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Tue night). Mainly fresh winds. | Days 5-7 Weather SummaryHeavy rain (total 116mm), heaviest during Sat night. Warm (max 28°C on Sun afternoon, min 25°C on Fri night). Winds decreasing (strong winds from the ENE on Sat afternoon, calm by Sun morning). | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
PM | 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) | E 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | E 9 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | E 9 | E 8 | E 8 | E 8 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 258 | 196 | 164 | 196 | 191 | 232 | 295 | 402 | 554 | 388 | 1400 | 2032 | 2770 | 3297 | 2723 | 1770 | 703 | 588 | 471 | 414 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | cross | cross | cross | cross-on | cross-on | cross-on |
High Tide | 2:41PM1.03m | 2:14AM0.56m | 3:15PM1.01m | 3:00AM0.61m | 3:46PM0.96m | 3:46AM0.64m | 4:14PM0.89m | 4:32AM0.66m | 4:38PM0.81m | 5:20AM0.67m | 4:59PM0.72m | 6:13AM0.67m | 5:15PM0.64m | |||||||
Low Tide | 9:19PM0.25m | 8:11AM0.01m | 9:48PM0.23m | 8:54AM0.06m | 10:15PM0.20m | 9:36AM0.13m | 10:43PM0.19m | 10:18AM0.22m | 11:09PM0.18m | 11:01AM0.32m | 11:37PM0.19m | 11:50AM0.41m | 00:06AM0.20m | |||||||
 |  | | |  |  | | | |  |  |  | |  | | |  | | | | |
 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — |
 | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 9 | 11 | 30 | 56 | 1 | 3 | 4 | 1 | 2 | — |
Temp °C | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 25 | 27 | 27 | 26 | 26 | 26 | 26 | 27 | 28 | 27 | 27 | 26 | 25 |
Feels °C | 27 | 26 | 27 | 27 | 26 | 27 | 26 | 24 | 26 | 26 | 25 | 26 | 24 | 26 | 31 | 32 | 31 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | W 11 | W 11 | W 10 | W 12 | W 12 | W 12 | W 12 | ENE 9 | E 9 | ENE 11 | ENE 11 | ENE 11 | W 13 | W 13 | ENE 10 | W 12 | W 11 | W 11 | W 11 |
| kJ | 6 | 22 | 9 | 9 | 11 | 11 | 11 | 11 | 554 | 388 | 1400 | 2032 | 2770 | 13 | 13 | 1440 | 25 | 22 | 22 | 9 |
Swell 2 Height (m) Direction Period (s) | W 10 | NNW 7 | NNW 7 | W 13 | NW 7 | NW 7 | NW 9 | NNW 8 | W 11 | W 12 | W 12 | W 11 | W 11 | — | — | W 12 | N 8 | N 8 | N 8 | N 8 |
| kJ | 8 | 5 | 5 | 13 | 2 | 2 | 3 | 6 | 10 | 11 | 11 | 9 | 10 | — | — | 26 | 1 | 1 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | W 15 | W 10 | W 13 | NNW 7 | — | E 12 | N 7 | W 12 | NNW 7 | NW 7 | NNW 8 | NNW 8 | NNW 7 | — | — | — | — | — | SE 11 | W 15 |
| kJ | 4 | 8 | 14 | 5 | — | 3 | 1 | 11 | 5 | 2 | 6 | 6 | 5 | — | — | — | — | — | 4 | 4 |
Wind waves Height (m) Direction Period (s) | E 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | — | NE 8 | — | — | — | ENE 10 | ENE 10 | E 9 | E 8 | E 8 | E 8 | ENE 7 |
| kJ | 258 | 196 | 164 | 196 | 191 | 232 | 295 | 402 | — | 198 | — | — | — | 3297 | 2723 | 1770 | 703 | 588 | 471 | 414 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 107 | 66 | 98 | 98 | 58 | 66 | 66 | 68 | 66 | 69 | 68 | 69 | 68 | 0 | 8 | 29 | 71 | 77 | 81 | 58 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Waimanu Bay 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 Waimanu Bay Surf forecast
The above surf forecast table for Waimanu Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanu Bay can be found by selecting the local surf guide option on the grey menu. Our Waimanu Bay 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 (Waimanu Bay) 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 Waimanu Bay 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.
Waimanu Bay is 74 km (46 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.
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