Surf Forecasts:
Kua Bay surf forecast from 27 Jul 2026:
- Most powerful swell: Friday 31 Jul, 11PM (local time) - 3.5ft (1.0m), 6s period, NE swell with 68 kJ wave energy.
Best Forecast Surf Conditions for Kua Bay this week:
The most powerful waves expected at Kua Bay in the next 16 days are 1.0m 6s and forecast to arrive on Friday (Jul 31) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 8s period and expected on Monday (Jul 27) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 31st Jul) | 3.5ft (1.0m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright, let’s break it down. Rusty here, and for Kua Bay, the next couple weeks are lookin’ pretty quiet. The first real chance of a wave doesn’t come until Friday, August 7th, so we’re lookin’ at a long dry spell.
From Monday July 27th through Thursday August 6th, it’s basically dead. Ten days of flat, choppy, or cross-onshore junk. There’s a moment on Thursday July 30th afternoon where it goes glassy, but the swell is a measly 1ft from the SW with a very long 18-second period, and the combined energy is a weak 49. Not worth wettin’ a wetsuit for.
The one standout is Friday, August 7th afternoon. The wind drops to 5 km/h from the SW, and it turns glassy. We get a 2ft swell from the W at 15 seconds, with a combined energy of 215 (moderate). That’s a glassy, clean window with a long-period groundswell. It’s not big, but it’s the best wave of the whole 16-day forecast. For a break like Kua Bay, which is exposed and can get crowded sometimes, this is the session to aim for.
Saturday August 8th and Sunday August 9th see the swell build to 2ft from the W at 15 seconds, with energy in the 200s (212 to 254). That’s a bit more size, but the wind is cross or cross-onshore, so the conditions are marginal. The scores are only a 1 out of 10, meaning the tide or the chop will mess with the shape. Only for the die-hards.
Water temp is about average for the time of year, so no worries there.
If you’re keen, the only real window is Friday August 7th afternoon. Glassy, clean, small but rideable. That’s your best bet.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed morning. Warm (max 29°C on Mon afternoon, min 25°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummarySome drizzle, heaviest during Wed night. Warm (max 28°C on Fri morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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 | NNE 8 | NNE 8 | NNE 8 | ENE 13 | ENE 12 | NNE 9 | NNE 8 | NNE 8 | SW 19 | SW 18 | SW 18 | SW 16 | SW 16 | N 9 | NE 5 | NNE 6 | SW 14 | NE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 49 | 49 | 41 | 40 | 13 | 49 | 46 | 29 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | glassy | cross-on | cross-on | cross-off | cross-on | cross-on | cross-off | cross-on | glassy | glassy | cross-on | glassy | cross | cross-on | cross-on | glassy |
High Tide | 2:27AM0.32m | 3:16PM0.81m | 3:05AM0.34m | 3:48PM0.82m | 3:41AM0.37m | 4:17PM0.82m | 4:18AM0.40m | 4:45PM0.81m | 4:57AM0.44m | 5:12PM0.77m | 5:39AM0.48m | 5:39PM0.72m | |||||||
Low Tide | 9:59PM0.18m | 7:51AM0.07m | 10:24PM0.16m | 8:31AM0.06m | 10:48PM0.14m | 9:09AM0.06m | 11:12PM0.13m | 9:46AM0.07m | 11:35PM0.12m | 10:24AM0.11m | 11:59PM0.11m | 11:05AM0.16m | 00:23AM0.10m | ||||||
 |  | | | | | |  | |  |  | | | | | | | | | |
 | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | 7:02 | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 29 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 27 | 27 | 28 | 28 | 26 | 27 | 28 | 27 |
Feels °C | 29 | 29 | 31 | 30 | 30 | 29 | 30 | 30 | 30 | 29 | 30 | 30 | 31 | 31 | 32 | 30 | 28 | 29 | 28 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | ENE 12 | NNE 9 | NNE 8 | NNE 8 | NE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | SW 15 | ENE 8 | NE 8 | NE 8 |
| kJ | 91 | 113 | 91 | 108 | 103 | 294 | 134 | 79 | 44 | 65 | 43 | 79 | 45 | 45 | 78 | 55 | 26 | 110 | 86 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 15 | ENE 14 | E 13 | ENE 13 | NNE 7 | NE 10 | ENE 9 | ENE 8 | SSW 13 | SW 18 | SW 18 | SW 16 | SW 16 | SW 15 | N 8 | SW 14 | SW 14 | SW 14 |
| kJ | 48 | 42 | 66 | 92 | 238 | 70 | 104 | 32 | 14 | 31 | 49 | 49 | 41 | 40 | 60 | 5 | 49 | 29 | 49 |
Swell 3 Height (m) Direction Period (s) | E 14 | E 13 | NE 10 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SW 19 | NNE 6 | SSW 12 | N 10 | N 9 | N 9 | E 15 | N 8 | E 15 | E 15 |
| kJ | 16 | 31 | 27 | 41 | 37 | 39 | 37 | 36 | 34 | 15 | 4 | 28 | 7 | 14 | 13 | 4 | 5 | 17 | 17 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 5 | NNE 6 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 49 | 46 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 96 | 20 | 14 | 98 | 20 | 4 | 51 | 100 | 39 | 103 | 4 | 4 | 100 | 4 | 14 | 18 | 14 | 4 |
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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