Surf Forecasts:
Kua Bay surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 5PM (local time) - 6ft (1.9m), 14s period, WSW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 7ft (2.1m), 14s period, WSW swell with 1,797 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 8PM (local time) - 4.5ft (1.3m), 13s 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 Sunday (Sep 06) at 8PM. The primary swell is predicted to be 1.3m and 13s period. 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 2.1m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 12s period and expected on Sunday (Sep 06) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 6th Sep) | 4.5ft (1.3m) 13s |
| Best Surf | 5PM (Mon 7th Sep) | 6ft (1.9m) 14s |
| Most Powerful | 8PM (Mon 7th Sep) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Right off the bat, we’re looking at a pretty quiet stretch for Kua Bay. The first few days are a total write-off, with no real swell showing up and poor surf conditions. Friday the 4th and Saturday the 5th are both flat and messy, with light cross-onshore winds just ruining any chance of a wave. Sunday the 6th sees a tiny pulse of 3.6ft SW swell late in the afternoon, but the period is a solid 12 seconds and the wind is light cross-on. It’s a marginal call, but it’s the first real sign of life.
The real standout window, and the only one worth getting excited about, is Monday the 7th and Tuesday the 8th. Monday afternoon brings a nice 6.2ft swell from the WSW with a 14-second period, and the wind goes glassy. That’s the sweet spot. The combined energy is up at 1504, which is solid, and the water temp is sitting at 81.9° with a normal anomaly for this time of year. This is the best on offer – clean, long-period groundswell, perfect for Kua Bay’s exposed setup. Surfers with some experience are going to have a blast. Tuesday morning follows it up with a 5.6ft WSW swell, 11 seconds, and a light offshore from the SSW. That’s clean, well-shaped, and the energy is still strong at 764. It’s not quite as good as Monday, but it’s still a very good session.
After that, the swell drops off a cliff. From Wednesday the 9th right through to the end of the 16-day run, we’re looking at tiny, weak waves – mostly under 2.3ft – with poor conditions and light onshore winds. The energy readings are all in the double digits, which is basically nothing. There’s a long gap of flat, small surf from the 9th to the 19th, with nothing worth paddling for. The water stays warm, but the ocean just isn’t cooperating.
Best bet: Monday 7th afternoon. That 6.2ft WSW swell, 14-second period, and glassy wind at Kua Bay is the clear winner. Get out there.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Tue night. Warm (max 29°C on Mon afternoon, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
AM | 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) | S 12 | NE 6 | SSW 12 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 11 | W 11 | WNW 10 | WNW 9 | W 6 | SW 7 | SW 16 | SW 18 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 52 | 0 | 0 | 0 | 0 | 0 | 392 | 363 | 934 | 1504 | 1430 | 764 | 651 | 173 | 44 | 13 | 8 | 42 | 49 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-on | cross | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross | cross-on | cross-on | cross-off | cross | cross-off | on | glassy |
High Tide | 10:26AM0.70m | 9:25PM0.26m | 11:46AM0.74m | 11:54PM0.28m | 12:47PM0.78m | 1:07AM0.33m | 1:36PM0.81m | 1:57AM0.40m | 2:18PM0.82m | 2:40AM0.48m | 2:55PM0.80m | 3:19AM0.56m | 3:28PM0.76m | 3:57AM0.62m | |||||||
Low Tide | 7:14PM0.25m | 3:19AM0.14m | 7:46PM0.20m | 4:58AM0.14m | 8:14PM0.15m | 6:18AM0.11m | 8:41PM0.12m | 7:21AM0.09m | 9:06PM0.09m | 8:14AM0.08m | 9:31PM0.07m | 9:04AM0.09m | 9:55PM0.06m | ||||||||
 |  |  | | | | |  |  | | | | | | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | 2 | 2 | — | — | — | — | — | 2 | 1 | — | 2 | — | — | — |
Temp °C | 28 | 28 | 26 | 28 | 27 | 26 | 28 | 28 | 27 | 28 | 29 | 28 | 29 | 28 | 27 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 31 | 31 | 30 | 30 | 30 | 29 | 31 | 31 | 31 | 31 | 33 | 31 | 31 | 30 | 32 | 30 | 30 | 29 | 29 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | NE 6 | SSW 12 | NNE 7 | SSW 12 | SSW 12 | SW 12 | SW 12 | SW 12 | SW 13 | SW 14 | WSW 14 | WSW 13 | WSW 11 | W 11 | WNW 10 | NE 8 | NE 6 | NE 7 | SW 16 | NNE 6 | NE 8 |
| kJ | 54 | 115 | 38 | 180 | 260 | 282 | 335 | 392 | 363 | 934 | 1504 | 1430 | 764 | 651 | 173 | 50 | 24 | 43 | 42 | 39 | 50 |
Swell 2 Height (m) Direction Period (s) | S 12 | E 14 | SSW 12 | NNE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 12 | NE 12 | NE 12 | NE 12 | NE 11 | NE 10 | NE 8 | WNW 9 | NNE 7 | SW 7 | SSW 13 | SW 18 | SW 16 |
| kJ | 76 | 16 | 111 | 37 | 56 | 39 | 37 | 46 | 205 | 144 | 240 | 137 | 168 | 108 | 57 | 44 | 21 | 8 | 16 | 49 | 68 |
Swell 3 Height (m) Direction Period (s) | E 14 | N 8 | ENE 14 | ENE 13 | ENE 13 | E 13 | E 12 | E 12 | SW 15 | SSW 17 | SSW 17 | NNE 7 | SSW 15 | SW 9 | SW 8 | SW 8 | W 6 | SSW 13 | SSW 7 | SSW 8 | ENE 13 |
| kJ | 15 | 1 | 37 | 57 | 60 | 86 | 75 | 73 | 223 | 96 | 93 | 19 | 85 | 79 | 50 | 14 | 13 | 33 | 5 | 6 | 17 |
Wind waves Height (m) Direction Period (s) | — | NE 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 7 | — | — |
| kJ | — | 52 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 71 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 100 | 14 | 20 | 30 | 30 | 4 | 30 | 10 | 10 | 32 | 0 | 0 | 0 | 14 | 10 | 98 | 26 | 20 | 100 | 101 | 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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