Surf Forecasts:
Kawaihae Breakwater surf forecast from 16 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 11PM (local time) - 1.5ft (0.4m), 13s period, WNW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 1.5ft (0.4m), 17s period, SW swell with 72 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 11PM (local time) - 1.5ft (0.4m), 13s period with WNW swell.
Best Forecast Surf Conditions for Kawaihae Breakwater this week:
The surf forecast for Kawaihae Breakwater over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 11PM. The primary swell is predicted to be 0.4m and 13s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Kawaihae Breakwater in the next 16 days are 0.4m 17s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Saturday (Aug 15) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 18th Aug) | 1.5ft (0.4m) 13s |
| Best Surf | 11PM (Tue 18th Aug) | 1.5ft (0.4m) 13s |
| Most Powerful | 8AM (Fri 21st Aug) | 1.5ft (0.4m) 17s |
Table - best surf conditions forecast for Kawaihae Breakwater over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's be honest, the surf outlook for the next couple of weeks is looking pretty bleak. We're in for a long stretch of tiny, weak waves, and it's going to be a while before we see anything that gets the heart pumping. The water temp is right about 81°, which is pretty standard for this time of year, so at least you won't be freezing while you're staring at a flat ocean.
The first few days are a total loss. Saturday the 15th is blown out with a nasty 31 mph onshore wind in the morning, making it a battle just to get past the shore break. It eases off a little in the afternoon, but the swell is a pathetic 0.7ft, so don't even bother. Sunday the 16th turns glassy, and the swell bumps up slightly to 1ft, but the energy is still weak (37). It's pretty, but there's simply nothing to ride.
We then have a good stretch of small, clean, but ultimately gutless surf from the 17th to the 19th. The wind is light or offshore, which is great for the surface, but the swell stays locked between 1ft and 1ft. The energy is weak, bottoming out around 25 on Monday, before building to a still-modest 73 by Wednesday. You'll pick off a few ankle-biters at Kawaihae Breakwater, but it's more of a float than a surf.
Now, the period from the 20th to the 22nd gets a little more interesting, but only just. The swell direction swings around to the southwest, and the period jumps up to a solid 17-18 seconds. That's proper groundswell, and it's coming from the west, which is the ideal direction for this reef. The energy is moderate, sitting in the 70s, but the wave heights are still tiny, only about 1ft to 1ft. It's a powerful engine in a go-kart frame. The glassy conditions on the 21st will make it look inviting, but you'll be doing more floating than surfing.
After that, we slide right back into the doldrums. From the 23rd to the 26th, it's mostly small, weak, and not worth the drive. The swell drops back down to 0.7ft at times, and the energy gets very weak, bottoming out at just 9. There are plenty of glassy windows, but you can't ride glass.
Here’s the one glimmer of hope in this entire forecast, and it's a long way off. Around Thursday the 29th and into Sunday the 30th, we finally see a bit of a pulse. The swell kicks up to a still-small but more rideable 2ft, and the period is a solid 13-14 seconds. The energy starts to build into moderate territory, hitting 106 on Saturday afternoon and then 111 on Sunday morning. It's not going to be big, but with light offshore winds and that long-period west-northwest swell, Kawaihae Breakwater might actually serve up a few fun, clean waves. This is the standout period of the whole outlook, but remember, it's way out there, so treat it as a hopeful maybe, not a guarantee. If you're keen, keep your eyes on that final weekend.
This has been a rough patch, but the ocean always has something to say. We just gotta listen.
Rusty out.
Short Range ForecastHeavy rain (total 32mm), heaviest during Sat night. Warm (max 29°C on Sat afternoon, min 24°C on Mon night). Winds decreasing (severe gales from the ENE on Sat afternoon, calm by Sun afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Thu morning, min 25°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | W 11 | W 11 | SSW 7 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 13 | WNW 12 | WNW 12 | SW 16 | SW 18 | SW 17 | SW 16 | SW 17 | SW 16 | SW 16 |
Wave Graph | |||||||||||||||||||||
9 | 10 | 20 | 32 | 29 | 27 | 25 | 25 | 25 | 25 | 25 | 33 | 48 | 48 | 41 | 49 | 47 | 69 | 72 | 65 | 64 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | glassy | glassy | glassy | cross-off | off | off | cross-off | off | off | glassy | glassy | off | glassy | cross-off | off | glassy | glassy | glassy | glassy |
High Tide | 5:56PM0.60m | 6:49AM0.51m | 6:24PM0.51m | 7:40AM0.53m | 6:51PM0.41m | 8:37AM0.54m | 7:15PM0.33m | 9:44AM0.55m | 7:33PM0.25m | 10:59AM0.57m | 12:08PM0.59m | 11:45PM0.18m | |||||||||
Low Tide | 11:41AM0.09m | 00:29AM0.00m | 12:35PM0.16m | 00:54AM0.02m | 1:40PM0.21m | 1:21AM0.04m | 3:09PM0.25m | 1:51AM0.05m | 5:41PM0.25m | 2:31AM0.07m | 3:32AM0.09m | 8:34PM0.15m | |||||||||
6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
— | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | |
mm | 2 | 5 | 21 | — | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — |
Temp °C | 28 | 29 | 26 | 28 | 28 | 27 | 27 | 28 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 27 | 20 | 31 | 33 | 33 | 31 | 30 | 31 | 28 | 29 | 29 | 29 | 31 | 32 | 29 | 32 | 32 | 32 | 33 | 33 | 33 |
Swell 1 Height (m) Direction Period (s) | ENE 10 | NE 9 | NNE 8 | NE 8 | NE 8 | NE 7 | NE 6 | NE 6 | WNW 11 | NNE 5 | NNE 5 | NE 5 | NNE 4 | NNE 7 | NNE 7 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NE 7 |
34 | 128 | 76 | 78 | 86 | 64 | 45 | 47 | 25 | 15 | 17 | 13 | 8 | 26 | 25 | 23 | 16 | 17 | 18 | 30 | 21 | |
Swell 2 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SSW 7 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | ENE 8 | WNW 11 | WNW 11 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | SW 18 | SW 17 | SW 16 | SW 17 | SW 16 | SW 16 |
35 | 35 | 20 | 32 | 29 | 27 | 25 | 25 | 6 | 25 | 25 | 33 | 48 | 48 | 25 | 49 | 47 | 69 | 72 | 65 | 64 | |
Swell 3 Height (m) Direction Period (s) | W 11 | W 11 | ENE 9 | SW 6 | SW 6 | S 12 | S 12 | S 14 | S 13 | ENE 8 | W 13 | E 8 | SSW 16 | SW 16 | SW 16 | WNW 11 | WNW 11 | WSW 8 | WSW 8 | W 10 | W 10 |
9 | 10 | 30 | 5 | 5 | 12 | 11 | 16 | 14 | 6 | 14 | 1 | 25 | 42 | 41 | 24 | 23 | 7 | 6 | 8 | 9 | |
Wind waves Height (m) Direction Period (s) | NE 8 | NE 8 | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — | — | — | — | — | — | — |
338 | 542 | — | — | — | — | — | — | 16 | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 35 | 447 | 35 | 88 | 91 | 54 | 88 | 35 | 53 | 88 | 46 | 76 | 0 | 0 | 11 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.











