Surf Forecasts:
Kua Bay surf forecast from 12 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 8AM (local time) - 6.5ft (2.0m), 6s period, NE swell with 277 kJ wave energy.
Best Forecast Surf Conditions for Kua Bay this week:
The most powerful waves expected at Kua Bay in the next 16 days are 2.0m 6s and forecast to arrive on Sunday (Aug 16) at 8AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sun 16th Aug) | 6.5ft (2.0m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s be straight with you – this is a tough one. Kua Bay is the only game in town, and honestly, the surf just isn’t showing up for the first two weeks. We’ve got a long stretch of flat, weak conditions ahead, so if you’re a paddle surfer, you might want to find something else to do for a while.
The water temperature is sitting at 82°, which is about a degree warmer than usual for this time of year – feels like a warm bath, but that’s the only highlight right now.
The first real surf window that might get your heart beating is on Wednesday afternoon, August 19th. We finally see a little bump in energy, with the combined swell energy hitting 117 (moderate). The swell is small, only 2ft, but it’s coming from the west with a 12-second period, which gives it a bit of push. The wind is light and cross-offshore, so the surface should be clean. It’s not going to blow your mind, but it’s the first surfable wave in over a week. Kua Bay is a fairly consistent spot, but it’s been a dry spell.
After that, it’s back to mostly flat, tiny windswell, and cross-onshore winds. There’s a brief moment on Tuesday morning, August 25th with a tiny 2ft pulse from the north-northeast, but the period is a short 5 seconds, so it’ll be bumpy and weak. Honestly, for the entire 16-day outlook, there’s nothing that qualifies as a standout. The only day that even gets a “surfable” tag is August 19th, and even then, it’s ordinary.
If you’re a kite surfer, the setup on Saturday, August 15th might be more interesting than paddling. The swell jumps to 5ft to 6ft from the northeast, but the wind is strong and cross-shore, making it messy for a proper surf session. That kind of energy is better suited for a kite.
Otherwise, prepare for a lot of flat, glassy mornings and afternoons. The forecasts can change, but right now, it’s a waiting game.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 33mm), heaviest during Sat night. Warm (max 29°C on Fri afternoon, min 25°C on Sat night). Winds decreasing (strong winds from the NNE on Sat night, calm by Sun morning). | |||||||||||||||||||
Tue 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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 10 | W 11 | W 11 | WNW 13 | SSW 16 | NE 5 | W 12 | NNE 5 | NNE 5 | NNE 6 | NE 5 | NE 5 | NE 6 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 8 | 23 | 22 | 33 | 0 | 41 | 25 | 36 | 20 | 0 | 51 | 143 | 236 | 34 | 31 | 49 | 46 | 41 | 41 | 24 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | glassy | glassy | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross | cross-off | glassy | glassy | cross-on | cross | glassy | cross |
High Tide | 3:22PM0.91m | 3:31AM0.43m | 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 | |||||||
Low Tide | 10:18PM0.09m | 9:03AM0.02m | 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 | |||||||
 |  |  | |  | | | | | | | |  |  | | | | | |  | |
 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 19 | 5 | 6 | 2 | — | 3 | 1 |
Temp °C | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 | 29 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 31 | 30 | 29 | 30 | 31 | 30 | 30 | 29 | 30 | 30 | 31 | 26 | 26 | 27 | 33 | 32 | 31 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 5 | SSW 13 | SSW 13 | NNE 5 | SSW 16 | NNE 6 | SSW 14 | NE 7 | NNE 6 | SSW 14 | SSW 13 | WNW 11 | ENE 10 | WNW 13 | NE 10 | NNE 9 | NE 8 | NE 8 | NE 7 |
| kJ | 40 | 22 | 32 | 32 | 25 | 48 | 39 | 70 | 24 | 34 | 36 | 35 | 24 | 90 | 31 | 376 | 129 | 80 | 69 | 82 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | NE 7 | WNW 13 | SSW 16 | WNW 12 | SSW 15 | NE 8 | SSW 14 | NE 7 | W 12 | WNW 11 | SSW 13 | NE 9 | SSW 13 | WNW 12 | SSW 6 | SW 6 | WNW 11 | WNW 11 |
| kJ | 40 | 35 | 7 | 33 | 51 | 28 | 44 | 14 | 41 | 25 | 11 | 24 | 35 | 29 | 17 | 49 | 12 | 9 | 41 | 24 |
Swell 3 Height (m) Direction Period (s) | W 10 | W 11 | W 11 | S 17 | SSW 13 | SSW 12 | W 12 | W 12 | W 11 | SSW 14 | W 15 | W 15 | SW 16 | WNW 13 | S 16 | S 13 | WNW 12 | WNW 11 | SW 5 | S 13 |
| kJ | 8 | 23 | 22 | 53 | 32 | 14 | 25 | 25 | 10 | 40 | 4 | 4 | 10 | 34 | 5 | 13 | 46 | 41 | 4 | 14 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 4 | NE 5 | — | NE 5 | — | NNE 5 | NNE 5 | — | NE 5 | NE 5 | NE 6 | NNE 8 | NE 10 | — | — | — | — | — |
| kJ | — | — | 8 | 27 | — | 41 | — | 36 | 20 | — | 51 | 143 | 236 | 224 | 479 | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 112 | 14 | 100 | 100 | 4 | 14 | 14 | 19 | 14 | 20 | 19 | 20 | 18 | 51 | 4 | 51 | 96 | 100 | 39 | 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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