Surf Forecasts:
Kawaihae Breakwater surf forecast from 3 Aug 2026:
- Most powerful swell: Monday 10 Aug, 2AM (local time) - 1.5ft (0.4m), 12s period, W swell with 44 kJ wave energy.
Best Forecast Surf Conditions for Kawaihae Breakwater this week:
The most powerful waves expected at Kawaihae Breakwater in the next 16 days are 0.4m 12s and forecast to arrive on Monday (Aug 10) at 2AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Sunday (Aug 09) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 10th Aug) | 1.5ft (0.4m) 12s |
Table - best surf conditions forecast for Kawaihae Breakwater over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the surf ahead.
The first week is a total write-off. From the 3rd of August through the 10th, it’s flat and hopeless. Tiny waves, poor conditions, and combined swell energy barely hitting 49. Not worth a second look.
Things finally show a pulse on the 11th of August. Kawaihae Breakwater (Hawaii) gets a tiny 0.3m swell from the WNW, with a 15-second period. The energy is 82, still weak, and conditions are glassy but the waves are just too small. This “ordinary” run continues through the 12th and 13th, with the energy climbing to 199 by the 13th, but still only 0.6m of swell.
The real window opens Thursday, the 14th of August. Swell hits 0.8m from the W, with a solid 16-second period. Combined energy jumps to 347, and we’ve got clean offshore NE winds. That’s a good combo. Friday the 15th is the best day: 0.9m from the WNW, 15-second period, energy at 365, and glassy conditions in the afternoon. This is the one to aim for. It’s a reef break, so that long period will line up nicely, and it’s fairly exposed to that westerly swell. Water temp is about average for the season. Crowds are possible, so keep your wits about you.
After that, it fades. The 16th and 17th still have surfable 0.8m waves from the W, but the energy drops to the 250s and conditions are just okay. The 18th is similar, with clean offshore wind but nothing to write home about.
Don’t bother before the 14th. The 14th and 15th are your best bets.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Mon morning, min 24°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Thu morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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 6 | W 11 | W 12 | W 12 | W 11 | W 11 | W 13 | W 13 | W 12 | W 12 | W 12 | W 12 | SSW 14 | W 12 | SSW 13 | SSW 13 | SSW 18 | SSW 18 | SSW 18 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 10 | 10 | 11 | 9 | 10 | 13 | 28 | 11 | 11 | 11 | 12 | 20 | 11 | 18 | 17 | 32 | 31 | 30 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | off | glassy | glassy | off | glassy | glassy | off | cross-off | off | glassy | cross-off | cross-off | off | cross-off | off | off | off |
High Tide | 7:40AM0.47m | 6:56PM0.51m | 8:43AM0.52m | 7:30PM0.41m | 9:54AM0.57m | 8:12PM0.32m | 11:08AM0.63m | 9:29PM0.23m | 12:16PM0.69m | 11:28PM0.19m | 1:16PM0.76m | 1:00AM0.19m | |||||||
Low Tide | 1:13AM0.01m | 1:09PM0.20m | 1:44AM-0.00m | 2:34PM0.25m | 2:20AM-0.00m | 4:37PM0.27m | 3:05AM-0.01m | 6:57PM0.22m | 4:04AM-0.01m | 8:13PM0.15m | 5:14AM-0.02m | 8:57PM0.09m | |||||||
 |  |  | | | |  | | | | | | | | | | | | | |
 | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — |
 | 7:00 | — | 6:59 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 28 | 28 | 26 | 27 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 28 | 26 |
Feels °C | 29 | 31 | 31 | 28 | 30 | 31 | 29 | 31 | 31 | 29 | 30 | 31 | 29 | 30 | 30 | 28 | 28 | 31 | 27 |
Swell 1 Height (m) Direction Period (s) | NNE 6 | N 6 | NNE 6 | N 6 | ENE 11 | NNE 6 | NNE 5 | NE 9 | NE 9 | NNE 4 | NE 5 | NE 5 | NNE 4 | NE 4 | NE 6 | NNE 5 | NE 6 | NE 9 | NE 7 |
| kJ | 35 | 20 | 18 | 18 | 47 | 12 | 9 | 22 | 21 | 8 | 11 | 22 | 7 | 10 | 60 | 19 | 26 | 12 | 54 |
Swell 2 Height (m) Direction Period (s) | NE 8 | NE 8 | NE 8 | ENE 11 | NNE 6 | ENE 11 | ENE 10 | NNE 5 | W 12 | NE 8 | NE 8 | NE 8 | NE 7 | NE 9 | W 12 | NE 8 | NE 10 | SSW 18 | SSW 18 |
| kJ | 31 | 30 | 17 | 48 | 11 | 46 | 38 | 5 | 11 | 18 | 10 | 9 | 9 | 14 | 11 | 16 | 15 | 31 | 30 |
Swell 3 Height (m) Direction Period (s) | N 9 | W 11 | W 12 | W 12 | W 11 | W 11 | W 13 | W 13 | NNE 9 | W 12 | W 12 | W 12 | SSW 14 | W 12 | SSW 13 | SSW 13 | SSW 18 | SSW 13 | SSW 13 |
| kJ | 6 | 10 | 10 | 11 | 9 | 10 | 13 | 28 | 8 | 11 | 11 | 12 | 20 | 11 | 18 | 17 | 32 | 17 | 17 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NE 4 | — | — | — | — | — | — | — | — | NE 6 | — |
| kJ | — | — | — | — | — | — | — | — | 9 | — | — | — | — | — | — | — | — | 47 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 46 | 91 | 88 | 23 | 23 | 86 | 23 | 88 | 88 | 50 | 54 | 88 | 46 | 86 | 91 | 87 | 86 | 46 | 46 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Kawaihae Breakwater Surf forecast
The above surf forecast table for Kawaihae Breakwater provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kawaihae Breakwater can be found by selecting the local surf guide option on the grey menu. Our Kawaihae Breakwater 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 (Kawaihae Breakwater) 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 Kawaihae Breakwater 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.
Kawaihae Breakwater is 87 km (54 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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