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Waimanu Bay Surf Forecast
/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Waimanu Bay surfForecast / HAW – Big Island / USA
16 Day Weather and Surf, issued 1 am Monday 18 May 2026 HSTForecast update in hr min s Forecast update imminent
Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimanu Bay sea temperature is
25.8° C
(Which is slightly warmer than usual)Best Forecast Surf Conditions for Waimanu Bay this week:
The most powerful waves expected at Waimanu Bay in the next 16 days are 2.3m 9s and forecast to arrive on Friday (May 22) at 5AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 13s period and expected on Thursday (May 21) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Fri 22nd May) | 7.5ft (2.3m) 9s |
Table - best surf conditions forecast for Waimanu Bay over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 6mm), mostly falling on Mon morning. Warm (max 26°C on Mon afternoon, min 23°C on Wed night). Mainly fresh winds. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Thu morning. Warm (max 24°C on Thu morning, min 22°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | Thursday 21 | Friday 22 | Saturday 23 | Sunday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
439 | 383 | 302 | 341 | 428 | 367 | 603 | 632 | 676 | 715 | 711 | 757 | 681 | 574 | 567 | 493 | 522 | 573 | 554 | 488 | 363 | |
Wind (km/h) | |||||||||||||||||||||
cross-on | cross-on | cross | cross-on | 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-on | cross-on | cross-on | cross | |
High Tide | 4:57PM1.05m | 3:53AM0.45m | 5:46PM1.01m | 4:45AM0.42m | 6:38PM0.95m | 5:56AM0.39m | 7:31PM0.88m | 7:44AM0.40m | 8:25PM0.81m | 9:55AM0.45m | 9:17PM0.74m | 11:27AM0.55m | 10:08PM0.68m | ||||||||
Low Tide | 9:19AM-0.03m | 00:02AM0.33m | 10:02AM0.01m | 1:05AM0.33m | 10:46AM0.08m | 2:13AM0.32m | 11:36AM0.17m | 3:16AM0.30m | 12:39PM0.28m | 4:06AM0.27m | 2:11PM0.37m | 4:45AM0.23m | 4:07PM0.43m | ||||||||
 |  |  |  | |  |  | | | | |  | | | | | | | | | | |
 | 5:45 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:53 | — | — | 6:53 | — | — | 6:53 | — | — | 6:54 | — |
1 | 2 | — | — | — | 1 | — | — | 2 | 1 | — | — | — | — | — | — | — | 1 | — | — | — | |
Temp °C | 25 | 26 | 25 | 26 | 25 | 24 | 25 | 25 | 24 | 24 | 24 | 23 | 24 | 24 | 23 | 24 | 24 | 23 | 24 | 24 | 23 |
25 | 26 | 26 | 26 | 25 | 24 | 24 | 23 | 22 | 22 | 21 | 20 | 21 | 21 | 20 | 20 | 21 | 20 | 21 | 22 | 21 | |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NNW 13 | NNW 12 | NNW 13 | NNW 11 | NNW 11 | NNW 12 | NNW 12 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 10 | NW 11 | NW 10 | NW 10 | NNW 15 | NNW 13 | NNW 13 | ENE 8 |
 kJ | 17 | 18 | 14 | 17 | 51 | 47 | 55 | 53 | 46 | 20 | 19 | 9 | 11 | 20 | 30 | 28 | 27 | 42 | 69 | 64 | 363 |
Swell 2 Height (m) Direction Period (s) | NNW 15 | NNW 9 | NNW 9 | NNW 11 | SE 15 | N 13 | SE 14 | SE 14 | — | SSE 13 | SSE 13 | SSE 12 | NNW 11 | NW 10 | NW 11 | N 18 | NW 16 | NW 10 | NNW 10 | NNW 10 | NW 12 |
| kJ | 21 | 8 | 8 | 12 | 9 | 14 | 8 | 8 | — | 17 | 17 | 15 | 11 | 27 | 30 | 6 | 11 | 27 | 10 | 9 | 71 |
Swell 3 Height (m) Direction Period (s) | — | — | N 15 | N 8 | — | NNW 11 | — | — | — | — | — | — | SE 12 | SE 12 | S 12 | SE 12 | NW 16 | S 11 | S 11 | NW 10 | — |
| kJ | — | — | 4 | 1 | — | 79 | — | — | — | — | — | — | 6 | 6 | 3 | 5 | 11 | 2 | 2 | 15 | — |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | — |
| kJ | 439 | 383 | 302 | 341 | 428 | 367 | 603 | 632 | 676 | 715 | 711 | 757 | 681 | 574 | 567 | 493 | 522 | 573 | 554 | 488 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 98 | 72 | 74 | 98 | 98 | 67 | 58 | 107 | 101 | 107 | 66 | 58 | 107 | 68 | 58 | 58 | 66 | 58 | 98 | 58 | 58 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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 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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