Surf Forecasts:
Kua Bay surf forecast from 8 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 5.5ft (1.7m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 8ft (2.5m), 14s period, WSW swell with 2,278 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 8PM (local time) - 5.5ft (1.7m), 14s period with SW 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 Monday (Sep 07) at 8PM. The primary swell is predicted to be 1.7m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kua Bay in the next 16 days are 2.5m 14s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 12s period and expected on Monday (Sep 07) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 7th Sep) | 5.5ft (1.7m) 14s |
| Best Surf | 8PM (Mon 7th Sep) | 5.5ft (1.7m) 14s |
| Most Powerful | 2AM (Tue 8th Sep) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
G’day, it’s Rusty.
Let’s cut to it: the next fortnight at Kua Bay is looking mostly flat and frustrated. We’ve got one decent window early, then a long lull that’ll make you want to re-string your board. Water temp is 82°, which is about normal for the time of year – not too hot, not cold.
Your first real look is Monday the 7th. Swell is around 4ft from the southwest with a 15-second period – moderate energy (695). Wind is a light cross-on from the west, so there’s a bit of texture, but it’s surfable. Not the cleanest, but it’s a start.
The standout session is Tuesday morning the 8th. Swell jumps to 7ft from the west-southwest with an 11-second period. Wind swings to a cross-off from the south-southwest at 19 mph, and the energy is solid (972). This is the one to get out for – bigger, and the wind is keeping the faces pretty clean. Kua Bay (Kua-Bay) is fairly consistent, but it’s a beach break, and at this size and period, it might close out in sections. Still, it’s your best bet. Tuesday afternoon drops to 6ft, but the cross-off wind holds, so it’s still worth a session.
Now for the bad news. From Wednesday the 9th on, the swell just falls off a cliff. We're talking 2ft or less, with short periods and energy numbers in the single digits. Wednesday morning has 2ft at 7 seconds – that’s weak and wonky. Light cross-on wind, but there’s nothing to push you around.
From Thursday the 10th all the way to the 22nd, it’s a flat spell. There’s a tease of long-period energy – like Thursday afternoon with 1ft at 18 seconds – but with that size, it’s not breaking. The combined energy stays mostly below 100, which is weak. You might see a tiny bump around the 16th with 1ft at 18 seconds, but it’s still not enough to surf.
The winds are light most of the time, sometimes cross-off, but with no swell, it’s just a smooth, flat ocean. Honestly, for the next two weeks, this is better for a snorkel or a float than a surf. If you’re keen, that Tuesday morning is your only real window. After that, it’s time to wait for the next swell.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Tue night. Warm (max 29°C on Mon afternoon, min 26°C on Wed night). Winds decreasing (fresh winds from the S on Mon night, calm by Tue night). | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Thu afternoon. Warm (max 27°C on Thu afternoon, min 25°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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) | SW 15 | WSW 14 | WSW 11 | W 10 | WNW 9 | W 7 | W 6 | W 5 | SW 16 | SW 18 | SW 10 | SW 10 | SW 9 | SW 15 | WSW 9 | SW 14 | SW 14 | NNE 8 | W 11 | W 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 695 | 2278 | 972 | 539 | 140 | 34 | 11 | 5 | 42 | 49 | 16 | 24 | 22 | 0 | 7 | 29 | 29 | 0 | 11 | 9 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | glassy | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-on | cross | glassy | cross-on | cross | glassy |
High Tide | 1:57AM0.40m | 2:18PM0.82m | 2:40AM0.48m | 2:55PM0.80m | 3:19AM0.56m | 3:28PM0.76m | 3:57AM0.62m | 4:00PM0.70m | 4:35AM0.67m | 4:29PM0.63m | 5:12AM0.70m | 4:56PM0.55m | ||||||||
Low Tide | 8:41PM0.12m | 7:21AM0.09m | 9:06PM0.09m | 8:14AM0.08m | 9:31PM0.07m | 9:04AM0.09m | 9:55PM0.06m | 9:51AM0.11m | 10:19PM0.05m | 10:36AM0.14m | 10:41PM0.06m | 11:23AM0.19m | 11:04PM0.07m | |||||||
 |  |  | |  | |  |  |  | | | | | | | |  | | | | |
 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — |
mm | — | — | — | — | 4 | — | 2 | 5 | 1 | 3 | 5 | 2 | 1 | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 32 | 32 | 29 | 29 | 32 | 32 | 32 | 31 | 31 | 29 | 29 | 29 | 29 | 27 | 29 | 29 | 30 | 30 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | SW 15 | WSW 14 | WSW 11 | W 10 | WNW 9 | W 7 | NE 7 | NE 7 | NE 7 | NE 5 | NE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 5 | NE 9 | NNE 8 | NNE 8 | NNE 8 |
| kJ | 695 | 2278 | 972 | 539 | 140 | 34 | 52 | 52 | 43 | 10 | 64 | 35 | 42 | 22 | 42 | 16 | 75 | 62 | 26 | 61 |
Swell 2 Height (m) Direction Period (s) | NE 7 | NE 12 | NE 11 | NE 10 | NE 9 | NE 8 | W 6 | SSW 13 | SW 16 | NE 7 | SW 16 | ENE 11 | SW 15 | NE 4 | SW 14 | NNE 8 | SW 14 | SSW 12 | W 11 | SSW 14 |
| kJ | 57 | 137 | 145 | 129 | 62 | 32 | 11 | 34 | 42 | 17 | 68 | 24 | 57 | 7 | 49 | 26 | 29 | 15 | 9 | 20 |
Swell 3 Height (m) Direction Period (s) | ENE 12 | SSW 15 | SSW 15 | SSW 14 | WSW 8 | SW 7 | SW 7 | W 5 | SSW 13 | SW 18 | SW 10 | SW 10 | SW 9 | SW 15 | WSW 9 | SW 14 | W 11 | SSW 15 | SSW 15 | W 11 |
| kJ | 79 | 78 | 85 | 82 | 32 | 19 | 13 | 5 | 16 | 49 | 16 | 24 | 22 | 57 | 7 | 29 | 9 | 22 | 21 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 4 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 11 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 32 | 51 | 53 | 53 | 0 | 100 | 97 | 100 | 100 | 100 | 20 | 98 | 30 | 39 | 98 | 100 | 4 | 98 | 100 | 14 |
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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