Surf Forecasts:
Lahaina Breakwall/Harbour surf forecast from 18 Aug 2026:
- Best quality surf: Monday 17 Aug, 11PM (local time) - 1.5ft (0.4m), 14s period, SSW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 1.5ft (0.5m), 17s period, SW swell with 138 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 11PM (local time) - 1.5ft (0.4m), 14s period with SSW swell.
Best Forecast Surf Conditions for Lahaina Breakwall/Harbour this week:
The surf forecast for Lahaina Breakwall/Harbour over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 11PM. The primary swell is predicted to be 0.4m and 14s period with a secondary swell of 0.2m and 11s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Lahaina Breakwall/Harbour in the next 16 days are 0.5m 17s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Sunday (Aug 23) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 17th Aug) | 1.5ft (0.4m) 14s |
| Best Surf | 11PM (Mon 17th Aug) | 1.5ft (0.4m) 14s |
| Most Powerful | 8AM (Fri 21st Aug) | 1.5ft (0.5m) 17s |
Table - best surf conditions forecast for Lahaina Breakwall/Harbour over the next 16 days.
The Lowdown
Alright mates, Rusty again, giving it to you straight for Lahaina Breakwall/Harbour.
It’s a tame run of surf ahead. From Monday afternoon onward there is something to ride, but don’t expect much. Waves hang between about 1 ft and 2 ft for most of the period, with just one brief bump to around 4 ft at the very end. The wind is your friend – solid offshore from the NE or ENE almost every day, so the surface will be clean. But the wave energy tells the story: mostly weak numbers in the two-digit range, just flirting with moderate occasionally. The water temperature is sitting at about 81°, right around normal for this time of year.
The best stretch falls from Friday afternoon, August 21st, through Sunday, August 23rd. That Friday, you’ve got 1 ft from the SW at 16 seconds, light NE breeze at 6 mph creating clean lines. Saturday the 22nd keeps the same size and period, with a light cross-off wind and a touch more energy – the best of the run. Sunday morning the offshore kicks back in. After that, it’s more tiny and ordinary until Sunday the 30th, when a 4 ft south swell shows up but with a period of only 5 seconds – that’s going to be chop and closeouts, not worth paddling out on.
Crowds can pop up here “sometimes”, so expect company on the better days. Grab a log and you’ll find some fun little walls.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | SSW 14 | SSW 13 | S 13 | SW 18 | S 13 | SW 16 | SW 16 | SW 16 | SW 18 | SW 17 | SW 16 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 68 | 59 | 30 | 49 | 31 | 41 | 68 | 41 | 79 | 77 | 95 | 100 | 93 | 124 | 90 | 88 | 86 | 80 | 63 | 59 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | off | off | off | off |
High Tide | 5:55PM0.52m | 8:06AM0.48m | 5:48PM0.46m | 10:06AM0.48m | 12:33PM0.52m | 1:26PM0.57m | 1:58PM0.61m | 11:45PM0.28m | 2:25PM0.65m | 1:00AM0.32m | ||||||||||
Low Tide | 00:31AM0.09m | 12:52PM0.34m | 1:00AM0.10m | 1:43AM0.11m | 3:06AM0.12m | 5:01AM0.11m | 9:34PM0.25m | 6:12AM0.08m | 9:05PM0.24m | |||||||||||
 |  |  | | | | |  | | | | | | | | | | | | | |
 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — |
 | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 25 |
Feels °C | 28 | 26 | 26 | 27 | 25 | 27 | 28 | 26 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 29 | 28 | 27 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 13 | S 13 | S 13 | S 13 | E 8 | SW 16 | SW 16 | E 7 | NE 7 | NNE 7 | NNE 7 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | WNW 12 | NW 11 | E 9 |
| kJ | 68 | 59 | 30 | 30 | 30 | 47 | 68 | 41 | 40 | 57 | 30 | 30 | 93 | 124 | 90 | 88 | 86 | 56 | 63 | 42 |
Swell 2 Height (m) Direction Period (s) | W 11 | W 11 | WSW 17 | SW 18 | WNW 12 | SW 16 | S 12 | W 11 | SW 18 | E 7 | ENE 7 | SW 17 | W 10 | W 10 | WNW 10 | WNW 10 | WNW 11 | SW 15 | SW 15 | NW 11 |
| kJ | 9 | 10 | 28 | 49 | 14 | 41 | 11 | 9 | 79 | 17 | 19 | 100 | 19 | 17 | 19 | 20 | 22 | 80 | 56 | 59 |
Swell 3 Height (m) Direction Period (s) | SW 5 | WSW 6 | W 11 | W 13 | WSW 18 | W 12 | W 12 | S 12 | S 11 | SW 17 | SW 16 | ENE 7 | E 8 | E 8 | WSW 10 | S 12 | NW 14 | SW 9 | SW 9 | SW 14 |
| kJ | 1 | 4 | 9 | 14 | 31 | 25 | 11 | 11 | 10 | 77 | 95 | 15 | 11 | 12 | 10 | 11 | 29 | 3 | 3 | 54 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 5 | ENE 8 | ENE 5 | ENE 5 | NE 6 | NE 8 | ENE 7 | NE 6 | — | — | NE 7 | NE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | NE 6 |
| kJ | 183 | 86 | 138 | 74 | 61 | 42 | 163 | 111 | 40 | — | — | 44 | 100 | 68 | 98 | 100 | 211 | 184 | 195 | 139 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Maui | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Lahaina Breakwall/Harbour Surf forecast
The above surf forecast table for Lahaina Breakwall/Harbour provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Lahaina Breakwall/Harbour can be found by selecting the local surf guide option on the grey menu. Our Lahaina Breakwall/Harbour 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 (Lahaina Breakwall/Harbour) 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 Lahaina Breakwall/Harbour 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.
Lahaina Breakwall/Harbour is 20 km (12 miles) from Wailuku. If you plan a vacation in Maui, look for hotels and other accommodation in Wailuku. Wailuku has rooms for a wide range of budgets as well as car hire and transport links.
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