Surf Forecasts:
Kua Bay surf forecast from 26 Jul 2026:
- Most powerful swell: Friday 31 Jul, 11PM (local time) - 3ft (0.9m), 6s period, NE swell with 52 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 0.9m 6s and forecast to arrive on Friday (Jul 31) 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 1.3m 10s period and expected on Wednesday (Jul 29) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 31st Jul) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down Kua Bay for the next couple weeks.
Honestly, things start off real quiet. From Sunday the 26th of July, right through the end of the month, there’s just no surf to speak of. The ocean’s flat, the wind’s mostly onshore, and the combined swell energy is zero. Not a single wave worth paddling for. That’s nearly a full week of nothing.
We finally get a tiny pulse on Thursday the 30th of July – a small groundswell from the southwest, about 1ft at 18 seconds, but the energy is barely a whisper at 49. The wind is light and cross-shore, but with such a long period, it’s just not breaking properly at the beach. For the next few days into early August, we get similar weak, high-period SW pulses. The size is tiny, maybe 0.6ft to 1ft, and the combined energy stays in the doldrums.
Now, here’s the one window that might be worth waiting for. It’s a long way out, so treat it as promising but not set in stone. We’re looking at the weekend of the 9th and 10th of August. On Sunday the 9th, we get a west swell building to about 2ft to 3ft, with a long 16-second period. The combined swell energy jumps to a moderate 372 in the afternoon. The wind is light and glassy or light cross-shore, which is exactly what we want for clean waves. That’s the best of the whole forecast. The water temp will be around 80°, which is a little warmer than average.
For the first nine days, you’re staring at a flat spell. That’s normal for this spot sometimes. But that late window? It might just be a little gem if the wind holds. The direction from the west is spot-on for Kua Bay, and with that long period, the shape should be there.
Keep the faith.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 25°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Wed morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | |||||||||||||||
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) | NNE 8 | NE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 8 | ENE 13 | ENE 12 | NE 10 | NNE 9 | NNE 8 | SW 19 | SW 18 | SW 18 | SW 16 | SW 16 | N 9 | N 8 | N 8 | SW 14 | NE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 49 | 49 | 41 | 40 | 6 | 5 | 5 | 29 | 0 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross | on | cross-on | glassy | cross-on | cross-on | glassy | on | on | cross-off | on | cross | cross-on | cross-on | glassy | cross | cross-on | cross-on | cross-off |
High Tide | 2:43PM0.78m | 2:27AM0.32m | 3:16PM0.81m | 3:05AM0.34m | 3:48PM0.82m | 3:41AM0.37m | 4:17PM0.82m | 4:18AM0.40m | 4:45PM0.81m | 4:57AM0.44m | 5:12PM0.77m | 5:39AM0.48m | 5:39PM0.72m | ||||||||
Low Tide | 9:59PM0.18m | 7:51AM0.07m | 10:24PM0.16m | 8:31AM0.06m | 10:48PM0.14m | 9:09AM0.06m | 11:12PM0.13m | 9:46AM0.07m | 11:35PM0.12m | 10:24AM0.11m | 11:59PM0.11m | 11:05AM0.16m | 00:23AM0.10m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 28 | 28 | 28 | 28 | 29 | 27 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 27 | 27 | 28 | 27 |
Feels °C | 29 | 30 | 30 | 29 | 29 | 31 | 29 | 30 | 32 | 30 | 30 | 31 | 29 | 29 | 30 | 31 | 31 | 31 | 30 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | NE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 8 | ENE 13 | ENE 12 | NE 10 | NNE 9 | NNE 8 | NE 8 | NE 7 | NE 7 | NE 7 | NE 6 | SW 15 | NE 8 | NE 8 | NE 8 | NE 8 |
| kJ | 86 | 129 | 93 | 91 | 68 | 91 | 253 | 377 | 328 | 176 | 85 | 82 | 33 | 77 | 60 | 66 | 60 | 17 | 90 | 122 | 113 |
Swell 2 Height (m) Direction Period (s) | E 14 | SSW 16 | SSW 16 | SSW 15 | NNE 10 | E 14 | SSW 14 | SSW 14 | SSW 14 | ENE 9 | ENE 9 | SSW 13 | NNE 7 | SW 18 | SW 16 | SW 16 | N 9 | SW 15 | SW 14 | SW 14 | SW 14 |
| kJ | 16 | 84 | 48 | 42 | 36 | 98 | 37 | 39 | 37 | 16 | 15 | 31 | 10 | 49 | 41 | 40 | 6 | 56 | 49 | 29 | 49 |
Swell 3 Height (m) Direction Period (s) | S 10 | E 15 | E 14 | E 13 | ENE 14 | SSW 14 | — | — | — | SSW 14 | SSW 13 | SW 19 | SW 18 | SSW 12 | N 9 | N 9 | S 12 | N 8 | N 8 | E 15 | E 14 |
| kJ | 2 | 17 | 16 | 31 | 65 | 41 | — | — | — | 36 | 34 | 15 | 49 | 29 | 7 | 6 | 11 | 5 | 5 | 19 | 16 |
Wind waves Height (m) Direction Period (s) | NNE 8 | — | — | — | — | — | NNE 9 | NNE 9 | — | — | — | — | — | — | — | — | NE 7 | NE 6 | — | — | — |
| kJ | 123 | — | — | — | — | — | 127 | 154 | — | — | — | — | — | — | — | — | 97 | 54 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 16 | 39 | 14 | 96 | 18 | 4 | 20 | 16 | 4 | 100 | 20 | 26 | 97 | 136 | 20 | 100 | 39 | 14 | 112 | 14 | 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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