Surf Forecasts:
Kua Bay surf forecast from 8 Aug 2026:
- Best quality surf: Thursday 13 Aug, 5PM (local time) - 3ft (0.9m), 6s period, NNE swell with glassy winds.
- Most powerful swell: Thursday 13 Aug, 5PM (local time) - 3ft (0.9m), 6s period, NNE swell with 63 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 5PM (local time) - 3ft (0.9m), 6s period with NNE 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 Thursday (Aug 13) at 5PM. 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 Thursday (Aug 13) at 5PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Friday (Aug 14) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Thu 13th Aug) | 3ft (0.9m) 6s |
| Best Surf | 5PM (Thu 13th Aug) | 3ft (0.9m) 6s |
| Most Powerful | 5PM (Thu 13th Aug) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a look at what's on the table for the next couple of weeks.
We've got a pretty quiet stretch ahead. The first real chance to get wet won't be until Thursday afternoon, August 13th, and even then, it's only just tickling the surface. Before that, from now until Wednesday, the 12th, it's a total write-off – flat, no energy, nothing doing. So you're looking at a solid gap of nothing before the first bit of life shows up.
The one spot that could offer a paddle is Kua Bay. It's a fairly consistent break, exposed to WNW swell, and it's best when the swell comes from that direction. The water is sitting at a warm 82°, which is a touch warmer than normal for this time of year, so that's a nice bonus.
Now, for the standouts. The best of a very average bunch is looking like Thursday afternoon, August 13th. A tiny glassy pulse of 3ft sneaks in from the NNE. The wind goes glassy, and the combined swell energy is a modest 88 (moderate). It's nothing to get excited about size-wise, but with a glassy surface, it'll be your best chance for a clean, cruisy session on a small board. The wave period is a short 6 seconds, so it's pretty weak windswell, but at least it's rideable.
A bit further out, on Monday afternoon, August 17th, there's another tiny bump. We get 1.0ft from the WNW, but with a very long period of 16 seconds. That's proper groundswell energy. The combined energy is 77 (moderate). The wind goes glassy again. This is a promising one for a longboard or a funboard, as that long period will give the waves some shape and make paddling out easy. Just keep in mind, with that long period, it might break a bit straight across the beach, so it's not a screamer. It's a good session for a relaxed cruise.
Overall, don't expect any barrels or big walls. This is a quiet window. The swell is tiny, under 2ft for most of the run, so it's safe for beginners on the 13th and 17th afternoons, but the 3ft on the 13th might be a little punchy for absolute first-timers. Crowds are sometimes an issue at Kua Bay, so you might have a few people out for those small clean windows.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat afternoon, min 25°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Mon afternoon, min 25°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Fri 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 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) | W 12 | NE 11 | NE 10 | NE 5 | NNE 6 | W 13 | W 12 | W 12 | W 11 | W 11 | W 10 | W 12 | W 10 | W 13 | W 11 | W 13 | SSW 16 | W 12 | NNE 6 | W 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 11 | 0 | 0 | 32 | 0 | 28 | 25 | 23 | 21 | 21 | 19 | 12 | 8 | 29 | 22 | 30 | 0 | 25 | 63 | 11 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | on | glassy | glassy | cross-on | cross | glassy | cross-on | cross-on | glassy | cross-on | cross-off | glassy | on | cross | glassy | on | glassy | glassy |
High Tide | 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 | 4:34PM0.83m | 5:00AM0.54m | |||||||
Low Tide | 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 | 9:51AM0.05m | 11:15PM0.07m | |||||||
 |  | | |  |  | | | | | | | | | | | | | | | |
 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 28 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 30 | 30 | 31 | 30 | 31 | 30 | 30 | 30 | 30 | 31 | 31 | 30 | 31 | 29 | 30 | 31 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | NE 5 | NE 5 | NNE 5 | NE 10 | NNE 6 | NE 5 | NE 6 | NE 7 | NE 6 | NE 7 | NE 6 | SSW 14 | NNE 6 | NNE 5 | SSW 13 | NE 6 | NE 6 | NNE 6 | SSW 15 | NNE 6 |
| kJ | 22 | 21 | 16 | 15 | 27 | 29 | 44 | 46 | 37 | 63 | 31 | 41 | 59 | 22 | 32 | 46 | 34 | 41 | 44 | 43 |
Swell 2 Height (m) Direction Period (s) | W 12 | NE 11 | NE 10 | SSW 18 | NE 7 | W 13 | W 12 | W 12 | W 11 | SSW 15 | W 10 | W 10 | SSW 14 | SSW 13 | NE 6 | SSW 13 | SSW 16 | SSW 16 | W 12 | SSW 15 |
| kJ | 11 | 18 | 25 | 31 | 18 | 28 | 25 | 23 | 21 | 47 | 19 | 8 | 40 | 35 | 6 | 32 | 51 | 48 | 25 | 71 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 18 | SSW 13 | SSW 18 | NE 9 | NE 9 | SSW 12 | NE 8 | W 11 | SSW 15 | W 12 | W 10 | W 13 | W 11 | W 13 | SSW 13 | W 12 | SSW 12 | W 12 |
| kJ | 18 | 17 | 32 | 17 | 30 | 13 | 12 | 14 | 11 | 21 | 23 | 12 | 8 | 29 | 22 | 30 | 32 | 25 | 14 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 5 | — | — | — | — | — | — | — | NE 6 | — | — | NNE 5 | — | — | — | NNE 6 | — |
| kJ | — | — | — | 32 | — | — | — | — | — | — | — | 45 | — | — | 17 | — | — | — | 63 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 101 | 14 | 101 | 14 | 4 | 98 | 100 | 14 | 100 | 100 | 14 | 100 | 103 | 92 | 14 | 103 | 19 | 100 | 0 | 4 |
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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