Surf Forecasts:
Kua Bay surf forecast from 22 Aug 2026:
- Best quality surf: Sunday 23 Aug, 8AM (local time) - 1.5ft (0.5m), 10s period, WNW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 11AM (local time) - 1.5ft (0.5m), 12s period, WNW swell with 75 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 8AM (local time) - 1.5ft (0.5m), 10s period with WNW swell.
Best Forecast Surf Conditions for Kua Bay this week:
The surf forecast for Kua Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 8AM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.3m and 15s. Another secondary swell of 0.7m and 6s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kua Bay in the next 16 days are 0.5m 12s and forecast to arrive on Sunday (Aug 23) at 11AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 6s period and expected on Sunday (Aug 23) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 23rd Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 8AM (Sun 23rd Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 11AM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright, let’s break it down for the imperial crew. This forecast is a tough one – a real flat spell for the next couple of weeks. If you’re keen for a session, you’re gonna need to wait it out.
For nearly the whole 16 days, the surf is flat and lifeless. The only break in the game is Kua Bay, and it’s struggling. Water temp is 82°F, which is a touch warmer than usual for August – feels like a heated swimming pool.
The only tiny flicker of hope is right at the end. Heading into Saturday afternoon, the 5th of September, we finally get a pulse. You’ve got a 1ft swell from the WNW with a 13-second period. The energy is still weak, but it’s there. The wind goes glassy, SSW at 3 mph, so the surface will be clean as a whistle. It’s surfable, but it’s weak and ordinary. For an exposed spot like Kua Bay that needs a proper WNW groundswell, this is a consolation wave, not a ripper. Everything before that is a long, flat gap with nothing going on. Just one of those quiet stretches.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Sun night. Warm (max 29°C on Mon morning, min 26°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 15mm), heaviest on Tue afternoon. Warm (max 28°C on Mon afternoon, min 25°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Fri 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | ||||||||||||||
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) | W 11 | W 10 | SW 15 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 9 | WNW 12 | WNW 12 | SSW 13 | NE 6 | NE 6 | NNE 5 | NNE 5 | NE 6 | SSW 16 | SSW 16 | N 8 | N 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 59 | 50 | 37 | 57 | 58 | 75 | 44 | 8 | 14 | 13 | 0 | 0 | 0 | 15 | 0 | 0 | 0 | 0 | 5 | 4 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross | cross-off | glassy | on | cross | glassy | cross-on | cross-on | glassy | cross | glassy | cross | on | glassy | glassy | cross-on | cross-off | cross |
High Tide | 11:29PM0.26m | 12:58PM0.68m | 00:53AM0.29m | 1:40PM0.72m | 1:39AM0.32m | 2:15PM0.76m | 2:16AM0.36m | 2:46PM0.78m | 2:51AM0.41m | 3:15PM0.79m | 3:25AM0.47m | 3:42PM0.78m | 4:00AM0.52m | |||||||
Low Tide | 8:38PM0.25m | 8:45PM0.21m | 5:58AM0.15m | 9:01PM0.18m | 6:54AM0.12m | 9:20PM0.16m | 7:39AM0.10m | 9:39PM0.14m | 8:20AM0.08m | 9:58PM0.11m | 9:00AM0.08m | 10:18PM0.10m | ||||||||
 |  |  | | | | |  | |  |  |  | | | | | | | | | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — |
mm | — | — | — | — | — | — | — | 2 | — | 2 | 2 | 2 | 6 | 2 | — | — | 1 | — | — | 2 |
Temp °C | 28 | 27 | 28 | 27 | 27 | 27 | 28 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 27 | 27 | 26 |
Feels °C | 31 | 32 | 31 | 31 | 32 | 32 | 31 | 31 | 32 | 31 | 32 | 32 | 32 | 31 | 30 | 31 | 29 | 29 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | SSW 14 | NNE 5 | NE 6 | NNE 5 | NNE 5 | NE 5 | NE 5 |
| kJ | 65 | 46 | 46 | 70 | 39 | 52 | 64 | 33 | 40 | 62 | 24 | 38 | 51 | 21 | 23 | 44 | 16 | 9 | 27 | 11 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 10 | WNW 10 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 9 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 15 | SSW 17 | SSW 13 | SSW 16 | SSW 15 | SSW 15 |
| kJ | 59 | 50 | 33 | 57 | 58 | 75 | 44 | 8 | 18 | 35 | 32 | 29 | 14 | 14 | 21 | 28 | 17 | 24 | 44 | 42 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | WNW 12 | WNW 12 | ENE 7 | SSW 16 | SSW 16 | ENE 7 | SSW 11 | SSW 14 | SSW 16 | SSW 12 | N 8 | N 7 |
| kJ | 65 | 64 | 37 | 63 | 58 | 34 | 21 | 20 | 14 | 13 | 5 | 25 | 24 | 5 | 12 | 18 | 25 | 15 | 5 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 15 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 30 | 14 | 32 | 30 | 4 | 30 | 18 | 14 | 97 | 97 | 14 | 100 | 103 | 14 | 14 | 100 | 14 | 100 | 100 | 20 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Kua Bay Surf forecast
The above surf forecast table for Kua Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kua Bay can be found by selecting the local surf guide option on the grey menu. Our Kua 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 (Kua 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 Kua 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.
Kua Bay is 97 km (60 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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