Surf Forecasts:
Kua Bay surf forecast from 25 Jul 2026:
- Most powerful swell: Thursday 30 Jul, 2PM (local time) - 1ft (0.3m), 18s period, SW swell with 49 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 0.3m 18s and forecast to arrive on Thursday (Jul 30) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 8s period and expected on Saturday (Jul 25) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 30th Jul) | 1ft (0.3m) 18s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – Kua Bay is sittin' flat for a long stretch. We're looking at a solid gap of over a week with no real surf to speak of. The first proper pulse of energy ain't showing up until Thursday the 30th of July, and even then it's just a whisper.
Let's start with the water temp. It's sitting at a nice 80°, which is a tick above normal for this time of year (1° anomaly). Feels about right, a little warm and welcoming.
For the first week and a half, it's a total desert. The wind is often light or glassy, which would be a dream if we had waves, but we don't. There's just nothing on the cards until that tiny 1ft swell from the SW shows up on the afternoon of Thursday the 30th. It's got a long period of 18 seconds, but the combined energy is a measly 49 – barely a ripple. That tiny swell hangs around for a couple of days, but the wind is mostly cross or cross-onshore, so it's not going to be any good. A few days later, around Saturday the 1st of August, there's a tiny 0.7ft N swell with a period of 8 seconds (short period windswell) but the energy is only 5, so it's not worth getting wet for.
The real standout, if you can call it that, is shaping up way down the line. We're looking at Sunday the 9th of August. That morning we've got a 2ft swell from the west, with a period of 14 seconds and a combined energy of 104 (moderate energy). It's not huge, but it's the only real pulse on the whole forecast. The swell direction is WNW, which is the optimum direction for Kua Bay, so that's a match. The issue is the wind is light onshore in the morning, but the afternoon has a light cross-onshore breeze. It's nothing to write home about, but it's the best we're gonna get in this 16-day window. The afternoon of the 9th shows a 1ft WNW swell with a 15-second period and energy of 119, which is a little better. For a spot that's "fairly consistent" and gets "sometimes" crowded, a Sunday with a tiny pulse might actually see a few guys out, but it's for the longboard or foil crew only.
That's it, team. A long, flat spell with one tiny window of potential at the very end. Keep your boards waxed anyway, this stretch can't last forever.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Sat morning, min 25°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Tue morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
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 | NNE 8 | SW 14 | NNE 8 | NE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 9 | ENE 13 | ENE 13 | NE 10 | NNE 8 | N 7 | SW 19 | NE 7 | SW 18 | SW 16 | SW 16 | SW 15 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15 | 0 | 49 | 42 | 40 | 37 | 34 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | on | glassy | cross | on | cross-on | glassy | cross-on | glassy | cross-off | cross | cross-on | cross-off | cross-on | cross | glassy | cross-on | cross-on | cross-off |
High Tide | 2:06PM0.75m | 1:45AM0.30m | 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 | ||||||||
Low Tide | 9:35PM0.20m | 7:07AM0.10m | 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 | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 27 | 27 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 28 | 27 | 28 | 28 | 26 |
Feels °C | 31 | 30 | 29 | 29 | 30 | 29 | 30 | 29 | 28 | 29 | 30 | 31 | 30 | 30 | 30 | 30 | 31 | 31 | 30 | 31 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | NNE 8 | NNE 8 | NNE 8 | NE 8 | NNE 8 | NNE 8 | NE 10 | NNE 9 | ENE 13 | ENE 13 | NNE 9 | NNE 8 | N 7 | NE 8 | NE 7 | NE 7 | NE 6 | SW 16 | NE 6 | SW 15 |
| kJ | 51 | 149 | 126 | 126 | 129 | 93 | 93 | 27 | 127 | 168 | 302 | 111 | 113 | 52 | 94 | 75 | 100 | 56 | 40 | 75 | 34 |
Swell 2 Height (m) Direction Period (s) | SSW 20 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | ENE 13 | SSW 14 | SSW 14 | NE 10 | NE 9 | ENE 8 | SSW 13 | SSW 18 | SW 18 | SW 16 | N 9 | SW 15 | N 8 |
| kJ | 37 | 102 | 102 | 86 | 84 | 48 | 42 | 41 | 57 | 37 | 39 | 157 | 22 | 48 | 31 | 31 | 49 | 42 | 14 | 37 | 5 |
Swell 3 Height (m) Direction Period (s) | S 12 | S 11 | SW 14 | E 14 | E 15 | E 14 | E 13 | ENE 13 | SSW 14 | — | — | SSW 14 | NE 12 | SSW 13 | SW 19 | SSW 12 | SSW 12 | N 9 | S 12 | N 9 | S 12 |
| kJ | 11 | 2 | 8 | 16 | 17 | 16 | 30 | 33 | 41 | — | — | 37 | 21 | 34 | 15 | 14 | 14 | 7 | 11 | 13 | 3 |
Wind waves Height (m) Direction Period (s) | NNE 8 | — | — | — | — | — | — | NNE 8 | — | NNE 8 | NNE 8 | — | — | — | — | — | — | — | NE 6 | — | NE 6 |
| kJ | 120 | — | — | — | — | — | — | 95 | — | 119 | 134 | — | — | — | — | — | — | — | 64 | — | 88 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 112 | 4 | 100 | 4 | 4 | 18 | 16 | 4 | 98 | 4 | 4 | 51 | 100 | 4 | 100 | 98 | 4 | 100 | 103 | 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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