Surf Forecasts:
Kua Bay surf forecast from 9 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 5AM (local time) - 1ft (0.3m), 21s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 15 Sep, 5AM (local time) - 1ft (0.3m), 21s period, SW swell with 71 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 5AM (local time) - 1ft (0.3m), 21s 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 Tuesday (Sep 15) at 5AM. The primary swell is predicted to be 0.3m and 21s period with a secondary swell of 0.4m and 5s. 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 0.3m 21s and forecast to arrive on Tuesday (Sep 15) at 5AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 7s period and expected on Thursday (Sep 10) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 15th Sep) | 1ft (0.3m) 21s |
| Best Surf | 5AM (Tue 15th Sep) | 1ft (0.3m) 21s |
| Most Powerful | 5AM (Tue 15th Sep) | 1ft (0.3m) 21s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s be straight with you—this stretch ahead is about as flat as a pond. We’re looking at a long, boring run of tiny, weak surf that’s going to test your patience. For the next couple of weeks, there’s just nothing doing at Kua Bay. The swell is barely a ripple, the energy is almost non-existent, and you’d be better off finding another hobby for a while.
Things start off pretty sad. Wednesday and Thursday have a few bits of knee-high slop, but the winds are cross and it’s just messy. Friday is a touch cleaner with a light cross-off, but the swell is still nothing to write home about. Honestly, through the weekend and into the start of next week, we're talking about flat spells and waves that are barely breaking. There’s a brief glassy moment on Monday afternoon with a tiny 1.6ft bump, but it’s from the wrong direction and has no push.
The real kicker is the cold water. When we finally do get a wave, the water temp is sitting at 82°, which is about 1.8° warmer than usual for this time of year. It’s noticeable, but not crazy.
Now, I’m not going to lie to you—this blank run is pretty normal for the area. It does tend not to stay this poor for long, and forecasts can change. We do see a little more life starting to show around the 23rd and 24th, but it’s still small and weak. The energy finally starts to climb from a weak (22) to a moderate (113) by the 23rd, but the waves are only 1.6ft. The promising bit is late on Thursday the 24th, when we get a slightly better 2.3ft swell from the west, with a clean cross-off breeze. It’s not a standout, but it’s the best we’ll see in this whole run. That’s your window, but keep your expectations low. That’s all there is, folks. Stay patient.
Short Range ForecastHeavy rain (total 23mm), heaviest during Thu afternoon. Warm (max 29°C on Wed morning, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 27°C on Sat morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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) | W 7 | W 6 | NE 7 | SW 16 | SW 18 | SW 10 | SW 10 | SW 9 | SW 15 | WSW 8 | SW 14 | SW 14 | NNE 9 | W 11 | W 11 | W 10 | NNE 4 | SSW 21 | WSW 9 | WSW 9 | WNW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 22 | 11 | 0 | 42 | 49 | 16 | 23 | 21 | 0 | 7 | 29 | 29 | 0 | 9 | 9 | 8 | 10 | 0 | 8 | 7 | 11 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | cross-off | cross-on | glassy | cross | cross-off | cross | cross-on | cross-on | cross-off | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross | glassy |
High Tide | 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 | 5:50AM0.70m | 5:21PM0.47m | 6:31AM0.69m | 5:43PM0.41m | ||||||||
Low Tide | 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 | 12:12PM0.23m | 11:26PM0.09m | 1:09PM0.27m | 11:50PM0.11m | |||||||
 |  |  | |  |  | |  | | | | | | |  | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — |
mm | — | 1 | 4 | 2 | 6 | 8 | — | — | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 28 | 28 | 28 | 27 | 26 | 27 | 27 | 26 | 27 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 28 | 28 | 27 |
Feels °C | 33 | 31 | 33 | 31 | 29 | 29 | 30 | 30 | 28 | 30 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NE 7 | NE 7 | NE 7 | NE 7 | SW 16 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NE 8 | NNE 9 | NNE 8 | NE 9 | NNE 8 | NE 8 | NNE 4 | NNE 8 | NNE 7 | NNE 7 |
| kJ | 44 | 52 | 43 | 51 | 44 | 67 | 45 | 39 | 32 | 36 | 62 | 74 | 67 | 47 | 75 | 62 | 34 | 11 | 51 | 48 | 36 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 6 | SSW 13 | SW 16 | SW 18 | NNE 8 | SW 10 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 12 | NE 5 | SSW 14 | SW 14 | SSW 22 | NNE 8 | SW 20 | SW 19 | SW 19 |
| kJ | 22 | 11 | 33 | 42 | 49 | 13 | 23 | 57 | 57 | 49 | 29 | 29 | 15 | 16 | 20 | 7 | 46 | 25 | 98 | 96 | 94 |
Swell 3 Height (m) Direction Period (s) | SW 7 | SW 7 | SSW 7 | SSW 13 | SSW 13 | SW 10 | SW 16 | SW 9 | ENE 10 | WSW 8 | WSW 8 | WNW 11 | SSW 15 | W 11 | W 11 | W 10 | SSW 14 | SSW 21 | WSW 9 | WSW 9 | WNW 11 |
| kJ | 14 | 13 | 5 | 16 | 16 | 16 | 65 | 21 | 20 | 7 | 7 | 12 | 22 | 9 | 9 | 8 | 18 | 45 | 8 | 7 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 4 | — | — | — | — | — | — | — | — | — | — | NNE 4 | — | — | — | — |
| kJ | — | — | — | — | — | 8 | — | — | — | — | — | — | — | — | — | — | 10 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 98 | 97 | 19 | 100 | 100 | 4 | 30 | 4 | 39 | 98 | 100 | 4 | 98 | 14 | 4 | 98 | 98 | 18 | 30 | 30 | 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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