
Surf Forecasts:
Kua Bay surf forecast from 7 Sep 2026:
- Best quality surf: Monday 7 Sep, 11PM (local time) - 7ft (2.1m), 14s period, WSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 7ft (2.1m), 14s period, WSW swell with 1,710 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 8AM (local time) - 3.5ft (1.0m), 12s 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 8AM. The primary swell is predicted to be 1.0m and 12s 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 11PM. 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+) | 8AM (Mon 7th Sep) | 3.5ft (1.0m) 12s |
| Best Surf | 11PM (Mon 7th Sep) | 7ft (2.1m) 14s |
| Most Powerful | 11PM (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 have a look at what Kua Bay has on offer over the next couple of weeks.
Right off the bat, the outlook is a bit of a tough one. We’ve got a long stretch of very small or non-existent surf ahead. Things start off with a pulse on Monday the 7th and Tuesday the 8th, but after that, we’re looking at a serious flat spell that runs all the way from Wednesday the 9th through to the 21st of September. During that stretch, wave heights are barely registering, with energy numbers staying below 75 (weak). It’s going to be a quiet period for the Bay.
The only real chance for a surf comes right at the beginning. Monday morning the 7th sees a 3ft SW groundswell with a long 11-second period and light offshore NW breeze. Conditions will be clean, but the energy is a modest 205 (moderate). The water’s sitting at 82°, which is about average for this time of year. Monday afternoon the swell picks up a bit to 4ft, and the period stretches out to a very long 15 seconds, bumping the energy up to 695 (moderate-strong). However, the wind shifts cross-onshore from the West, so it will get a little lumpy. It's still the best offering of the window.
Tuesday the 8th is the real highlight, mate. Morning brings a 6ft swell from the WSW with a clean, cross-off wind from the SSW blowing at 19 mph. The energy is strong at 559 (moderate-strong). That 6ft is starting to get a bit meaty, and with that wind, Kua Bay should be offering some proper, lined-up waves. The afternoon stays clean but the swell drops slightly to 5ft. The optimum direction for Kua Bay is WNW, and this WSW swell is reasonably close, which is a plus. Because the swell is over 5ft, it might be pushing it for total beginners, but for intermediates and above, Tuesday morning is the standout of the entire forecast. Crowds are only "sometimes" an issue here, so you might get a few out, but it’s worth the paddle.
After that, it’s a flat spell right through until the 22nd. There’s a tiny pulse on the 20th and 21st with 1ft and 2ft swells, but the energy is still weak and the quality is poor. Honestly, after the 8th, you might want to save your energy.
So, in short: Tuesday the 8th is your day. Monday the 7th afternoon is a decent fallback. The rest of the 16 days? A solid blank run for the area. Forecasts can change, but as it stands, it’s a long dry spell.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Wed night. Warm (max 29°C on Mon afternoon, min 26°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Tue night). | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Thu morning. Warm (max 28°C on Thu morning, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | SW 11 | SW 15 | WSW 13 | WSW 10 | W 10 | WNW 9 | W 7 | WNW 7 | NE 7 | SW 16 | SW 18 | SW 16 | SW 10 | SW 10 | SW 15 | SW 15 | SW 14 | SW 14 | NNE 8 | W 11 | NE 8 |
Wave Graph | |||||||||||||||||||||
205 | 695 | 1672 | 559 | 479 | 135 | 39 | 15 | 0 | 42 | 50 | 42 | 25 | 24 | 0 | 0 | 29 | 29 | 0 | 11 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | cross-off | cross-off | glassy | cross-on | cross-on | cross | glassy | cross-off | cross-off | cross-on | cross-on | cross | cross-off | cross | glassy | on | glassy | glassy |
High Tide | 1:36PM0.81m | 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 | — | — | 6:09 | — | — | |
— | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | |
mm | — | — | — | — | — | 1 | — | 2 | 6 | 1 | 1 | 2 | 1 | 2 | 4 | — | — | 1 | — | — | — |
Temp °C | 28 | 29 | 28 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 |
Feels °C | 32 | 32 | 32 | 29 | 29 | 32 | 31 | 31 | 31 | 32 | 31 | 32 | 30 | 28 | 28 | 28 | 28 | 30 | 30 | 30 | 29 |
Swell 1 Height (m) Direction Period (s) | SW 11 | SW 15 | WSW 13 | WSW 10 | W 10 | WNW 9 | W 7 | NE 7 | NE 7 | SW 16 | NE 7 | NNE 7 | NNE 8 | NE 8 | NNE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 8 |
205 | 695 | 1672 | 559 | 479 | 135 | 39 | 52 | 62 | 42 | 49 | 35 | 42 | 64 | 48 | 36 | 46 | 62 | 61 | 46 | 33 | |
Swell 2 Height (m) Direction Period (s) | NE 7 | NE 7 | ENE 12 | NE 11 | NE 10 | NE 9 | NE 8 | WNW 7 | SSW 13 | SSW 13 | SW 18 | SW 16 | SW 10 | SW 10 | SW 15 | SW 15 | SW 14 | SW 14 | SSW 12 | SSW 15 | NNE 4 |
55 | 59 | 119 | 142 | 122 | 62 | 53 | 15 | 33 | 16 | 50 | 42 | 25 | 24 | 57 | 60 | 29 | 29 | 15 | 21 | 6 | |
Swell 3 Height (m) Direction Period (s) | ENE 12 | ENE 12 | SSW 16 | SSW 15 | SSW 14 | SW 8 | SW 7 | SW 7 | SSW 7 | SSW 7 | SSW 13 | SW 11 | SW 16 | SW 15 | ENE 10 | NE 4 | WSW 8 | WSW 8 | SSW 15 | W 11 | SSW 14 |
79 | 79 | 81 | 84 | 82 | 46 | 14 | 13 | 5 | 5 | 16 | 18 | 65 | 57 | 21 | 5 | 7 | 7 | 22 | 9 | 20 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NE 7 | — | — | — | — | — | — | NNE 5 | — | — | NNE 4 | — |
— | — | — | — | — | — | — | — | — | 59 | — | — | — | — | — | — | 14 | — | — | 11 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 20 | 14 | 14 | 53 | 26 | 0 | 97 | 97 | 100 | 4 | 4 | 4 | 32 | 30 | 96 | 98 | 100 | 14 | 98 | 26 | 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.










