Surf Forecasts:
Kua Bay surf forecast from 13 Aug 2026:
- Best quality surf: Friday 14 Aug, 8PM (local time) - 4.5ft (1.4m), 6s period, NE swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 11PM (local time) - 4.5ft (1.4m), 6s period, NE swell with 131 kJ wave energy.
- Next surfable swell (1★+): Friday 14 Aug, 8PM (local time) - 4.5ft (1.4m), 6s period with NE 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 Friday (Aug 14) at 8PM. The primary swell is predicted to be 1.4m 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 1.4m 6s and forecast to arrive on Friday (Aug 14) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 7s period and expected on Saturday (Aug 15) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 14th Aug) | 4.5ft (1.4m) 6s |
| Best Surf | 8PM (Fri 14th Aug) | 4.5ft (1.4m) 6s |
| Most Powerful | 11PM (Fri 14th Aug) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright, I’ll level with you: over the next 16 days at Kua Bay, the surf is mostly a no-go. Don’t get your hopes up.
The water is running about 82°, a touch warmer than usual for this time of year, so it’s good for a dip. But for riding waves? It’s a real quiet stretch.
From Wednesday August 12th all the way through Sunday August 23rd, we’re looking at tiny swell – mostly around 1ft to 1ft. The wave energy is weak, with readings starting at just 33 and rarely cracking 70. A lot of afternoons have glassy or light cross-onshore wind, which would be perfect if there was any wave to push you, but there just isn’t. On Friday August 14th afternoon, we get a little bump to 4ft from the NNE with a short 6 second period and the energy hits 131 (moderate energy), but it’s choppy with a cross-onshore wind. That’s not a winner – it’s just the best of a bad bunch.
The main story here is flatness. For days on end, the waves are ankle-high or non-existent. The only faint glimmer comes around August 22nd and 23rd, with a 1ft swell from the SW and a longer 15-16 second period. The energy is still low (44-46) and the wind is light cross or cross-on. Kua Bay likes a WNW swell, so a SW groundswell isn’t its friend – it can make the wave close out quickly on the beach. The size is fine for beginners, but 1ft isn’t exactly thrilling.
There’s no true standout here. If I had to pick one, the morning of Sunday August 16th with a glassy 1ft WNW swell at 13 seconds and energy of 31 might be the cleanest little ripple you’ll find. Crowds are possible at Kua Bay when it’s this small because everyone is searching for something. But honestly, this is a blank run for the area. It happens.
Keep an eye on the forecast – things can always turn around.
- Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Thu afternoon, min 25°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Sun afternoon. Warm (max 28°C on Sat afternoon, min 25°C on Tue morning). Wind will be generally light. | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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) | WNW 13 | SSW 16 | WNW 12 | W 12 | NNE 6 | NNE 6 | NE 6 | W 12 | NNE 7 | NNE 8 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 11 | WNW 13 |
Wave Graph  | ||||||||||||||||||||
 kJ | 33 | 0 | 28 | 25 | 57 | 49 | 95 | 12 | 0 | 0 | 34 | 31 | 29 | 27 | 25 | 24 | 25 | 25 | 22 | 55 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | on | cross-on | glassy | on | cross-on | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | glassy | glassy | off | cross | cross | cross-off |
High Tide | 4:00PM0.88m | 4:16AM0.49m | 4:34PM0.83m | 5:00AM0.54m | 5:06PM0.76m | 5:44AM0.58m | 5:36PM0.67m | 6:30AM0.60m | 6:02PM0.58m | 7:19AM0.61m | 6:25PM0.49m | 8:16AM0.61m | 6:42PM0.41m | |||||||
Low Tide | 10:47PM0.07m | 9:51AM0.05m | 11:15PM0.07m | 10:38AM0.10m | 11:41PM0.07m | 11:27AM0.17m | 00:06AM0.08m | 12:18PM0.24m | 00:32AM0.09m | 1:18PM0.30m | 00:58AM0.11m | 2:41PM0.35m | 1:28AM0.14m | |||||||
 |  |  | | | | | | | |  |  |  |  |  | |  | | | | |
 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — |
 | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — | — | 6:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | 1 | 3 | 1 | 1 | 2 | — |
Temp °C | 27 | 27 | 28 | 29 | 27 | 28 | 28 | 27 | 29 | 28 | 28 | 27 | 28 | 27 | 28 | 28 | 27 | 25 | 25 | 25 |
Feels °C | 30 | 31 | 30 | 31 | 30 | 30 | 31 | 31 | 32 | 29 | 31 | 29 | 29 | 30 | 32 | 31 | 32 | 29 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NNE 5 | SSW 16 | NNE 6 | SSW 14 | NE 8 | SSW 14 | SSW 13 | NNE 7 | NNE 8 | NE 8 | NE 8 | NE 8 | NE 7 | NE 6 | NE 6 | NE 8 | NNE 5 | NNE 5 | NNE 4 |
| kJ | 44 | 25 | 48 | 40 | 70 | 16 | 40 | 35 | 169 | 203 | 182 | 135 | 120 | 89 | 49 | 64 | 9 | 17 | 17 | 8 |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 16 | WNW 12 | SSW 15 | W 12 | SSW 14 | W 12 | W 12 | NE 9 | ENE 9 | WNW 13 | SSW 9 | SW 7 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 11 | WNW 13 |
| kJ | 32 | 51 | 28 | 44 | 11 | 41 | 24 | 11 | 40 | 47 | 34 | 94 | 23 | 27 | 25 | 24 | 25 | 25 | 22 | 55 |
Swell 3 Height (m) Direction Period (s) | WNW 13 | SSW 13 | SSW 12 | W 12 | S 18 | W 11 | SW 17 | SW 17 | ENE 10 | SSW 13 | S 13 | WNW 13 | WNW 12 | SW 5 | S 12 | S 14 | S 13 | NE 8 | NE 7 | NE 7 |
| kJ | 33 | 32 | 28 | 25 | 6 | 10 | 12 | 12 | 33 | 35 | 14 | 31 | 29 | 5 | 11 | 16 | 14 | 15 | 9 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 5 | — | NNE 6 | NNE 6 | NE 6 | NE 7 | — | — | — | — | — | — | — | — | NNE 5 | — | — | — |
| kJ | — | — | 23 | — | 57 | 49 | 95 | 192 | — | — | — | — | — | — | — | — | 17 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 103 | 4 | 100 | 14 | 4 | 100 | 19 | 4 | 112 | 4 | 4 | 14 | 19 | 4 | 4 | 4 | 96 | 100 | 100 | 92 |
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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