Surf Forecasts:
Kua Bay surf forecast from 7 Aug 2026:
- Best quality surf: Tuesday 11 Aug, 8PM (local time) - 3ft (0.9m), 6s period, NE swell with glassy winds.
- Most powerful swell: Tuesday 11 Aug, 8PM (local time) - 3ft (0.9m), 6s period, NE swell with 52 kJ wave energy.
- Next surfable swell (1★+): Tuesday 11 Aug, 8PM (local time) - 3ft (0.9m), 6s period with NE 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 Tuesday (Aug 11) at 8PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.3m and 12s. 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 0.9m 6s and forecast to arrive on Tuesday (Aug 11) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Saturday (Aug 08) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 11th Aug) | 3ft (0.9m) 6s |
| Best Surf | 8PM (Tue 11th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 8PM (Tue 11th Aug) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here. Let’s be straight with you – this outlook for Kua Bay is a tough one. We’re staring down a 16-day window that’s basically flat for the vast majority of it. You’re looking at a solid run of almost nothing, with tiny little waves and mostly poor conditions. The water temperature is about average for this time of year, so no surprises there in terms of warmth.
The first week is a write-off. From Friday, August 7th all the way through to Saturday, August 15th, we’ve got nothing but tiny, weak swell. We’re talking heights barely reaching 1 foot, with very low combined wave energy. The wind is mostly cross-onshore or light, but it doesn’t matter because there’s simply no power. Sunday morning the 9th and Monday the 10th are particularly flat with poor surf conditions. Not even worth paddling out for a splash.
The real kicker comes on Sunday, August 16th. That afternoon we finally see a pulse of life. The swell bumps up to 1 feet from the WNW, with a period of 12 seconds and a combined energy of 99 (moderate). The wind goes glassy, dead calm, meaning the surface will be clean. It’s only surfable, very ordinary at best, but it’s the best we’re going to get. Still, it’s tiny.
Then we get a bit of a tease. Monday, August 17th shows a jump in energy. The morning has a 2 feet swell from the W with a 14-second period, and the combined energy hits 150 (moderate). The wind is offshore from the NW, but the conditions are listed as unknown. The afternoon cleans up nicely with a cross-offshore breeze from the SW and the same 2 feet swell. This is the standout. It’s not big, but for this stretch, it’s the cleanest and most powerful window. Tuesday morning the 18th drops off again, and after that, it’s back to the same old story of tiny, weak 1 feet scraps with very little energy through the rest of the week.
If you’re a beginner, none of this is too big, but it’s also not good enough to learn on. For experts, it’s just frustrating. The one little window on Monday, August 17th afternoon is the only time it’s worth keeping an eye on, but don’t get your hopes up. This is a long, quiet spell for the area.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 28°C on Sat afternoon, min 25°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sun night. Warm (max 29°C on Tue morning, min 25°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | ||||||||||||||
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) | SSW 14 | W 12 | W 12 | NE 5 | SSW 18 | NE 6 | NE 6 | W 13 | W 12 | W 12 | W 11 | W 11 | W 10 | W 10 | W 10 | W 13 | W 11 | W 13 | W 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 11 | 11 | 20 | 0 | 46 | 0 | 28 | 25 | 23 | 21 | 21 | 19 | 8 | 8 | 29 | 22 | 30 | 25 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | glassy | cross-on | glassy | glassy | cross-on | cross | glassy | cross-on | cross-on | glassy | on | cross | glassy | cross-on | cross-off | glassy |
High Tide | 8:46PM0.32m | 12:04PM0.74m | 11:08PM0.28m | 1:05PM0.81m | 00:47AM0.29m | 1:56PM0.86m | 1:52AM0.32m | 2:42PM0.90m | 2:44AM0.37m | 3:22PM0.91m | 3:31AM0.43m | 4:00PM0.88m | 4:16AM0.49m | ||||||
Low Tide | 3:45AM0.09m | 8:07PM0.25m | 5:01AM0.08m | 8:44PM0.19m | 6:14AM0.06m | 9:17PM0.14m | 7:17AM0.03m | 9:48PM0.11m | 8:12AM0.02m | 10:18PM0.09m | 9:03AM0.02m | 10:47PM0.07m | |||||||
 |  |  |  | | | | |  | | | | | | | | | | | |
 | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — |
 | 6:58 | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — |
mm | 1 | — | — | — | — | — | — | — | 1 | 1 | — | 2 | — | — | — | 1 | — | — | — |
Temp °C | 26 | 27 | 27 | 26 | 27 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 29 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 30 | 30 | 30 | 29 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 32 | 31 | 30 | 31 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 4 | NNE 4 | NE 5 | NE 11 | NE 6 | NE 10 | NE 6 | NE 6 | NE 7 | NE 6 | NE 7 | NE 6 | NNE 5 | NE 6 | NE 6 | NNE 5 | NE 6 | NE 6 | NE 6 |
| kJ | 8 | 7 | 23 | 18 | 24 | 15 | 32 | 39 | 73 | 40 | 55 | 70 | 15 | 54 | 64 | 23 | 9 | 51 | 28 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | W 12 | W 12 | W 13 | NE 10 | SSW 18 | NE 7 | W 13 | W 12 | W 12 | W 11 | SSW 15 | NE 7 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 16 |
| kJ | 20 | 11 | 11 | 13 | 16 | 31 | 19 | 28 | 25 | 23 | 21 | 47 | 11 | 40 | 40 | 35 | 32 | 32 | 51 |
Swell 3 Height (m) Direction Period (s) | ENE 8 | SSW 14 | SSW 13 | SSW 13 | SSW 18 | SSW 13 | SSW 18 | NE 9 | SSW 12 | NE 9 | SSW 12 | W 11 | W 10 | W 10 | W 10 | W 13 | W 11 | W 13 | W 12 |
| kJ | 6 | 18 | 18 | 17 | 32 | 17 | 30 | 13 | 15 | 12 | 15 | 21 | 19 | 8 | 8 | 29 | 22 | 30 | 25 |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 5 | — | NE 6 | — | — | — | — | — | — | — | — | — | — | NE 5 | — | — |
| kJ | — | — | — | 20 | — | 46 | — | — | — | — | — | — | — | — | — | — | 10 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 93 | 98 | 39 | 14 | 112 | 14 | 4 | 97 | 97 | 14 | 98 | 100 | 14 | 101 | 101 | 96 | 98 | 103 | 19 |
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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