Surf Forecasts:
Lahaina Breakwall/Harbour surf forecast from 15 Sep 2026:
- Best quality surf: Friday 18 Sep, 2AM (local time) - 2.5ft (0.7m), 18s period, SW swell with offshore winds.
- Most powerful swell: Friday 18 Sep, 2AM (local time) - 2.5ft (0.7m), 18s period, SW swell with 300 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 8PM (local time) - 1ft (0.3m), 22s period with SW 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 (Sep 14) at 8PM. The primary swell is predicted to be 0.3m and 22s period with a secondary swell of 0.3m and 14s. 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 0.7m 18s and forecast to arrive on Friday (Sep 18) 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 1.8m 9s period and expected on Thursday (Sep 17) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 14th Sep) | 1ft (0.3m) 22s |
| Best Surf | 2AM (Fri 18th Sep) | 2.5ft (0.7m) 18s |
| Most Powerful | 2AM (Fri 18th Sep) | 2.5ft (0.7m) 18s |
Table - best surf conditions forecast for Lahaina Breakwall/Harbour over the next 16 days.
The Lowdown
Alright, let's talk about this forecast. It's looking pretty meager for the next couple of weeks. Most days have tiny swell – we're talking knee-high at best. You'll still find the cleanest conditions with NE or ENE offshore winds, so the surface will be nice and glassy, but the power just isn't there.
Starting Monday afternoon, we've got 1ft of SW swell with a super long 21-22 second period. It’s clean, but the energy is weak. At Lahaina Breakwall/Harbour (Big Island), water temp is 81°, right on the average for this time of year.
Tuesday and Wednesday stay small—2ft to 2ft, still from the SW, with periods coming down to 17-20 seconds. Still clean, but it's a slow grind. Thursday and Friday morning, we might see a slight bump to 2ft, with the period around 16-17 seconds. Friday afternoon gets a bit windier, so it'll get bumpy.
The standout window is Saturday 19 September. We've got 2ft of SW swell, 16 second period, and light offshore winds in the morning. It’s the most consistent, cleanest run of the whole stretch. Energy is moderate, and you'll get some fun, small waves if you're keen.
After that, it backs right off. Sunday through early next week, we're back to 2ft, then dropping to 1ft by mid-week. The period also shortens to 13-15 seconds, and the energy fades into the weak zone. By the end of the month, it's really marginal – 1ft and almost no push.
So, bottom line: no big days coming up. If you're desperate, Saturday 19 September is your best bet for a few clean, small waves. Otherwise, it's a good time to work on your pop-up or just enjoy the water. Nothing here for beginners to worry about, but there's also nothing for the experienced crew to get excited about either.
Keep it simple, stay patient.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Tue morning, min 25°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu afternoon. Warm (max 28°C on Fri afternoon, min 25°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | ||||||||||||||
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) | SW 22 | SW 21 | SW 20 | SW 19 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 16 | SSW 15 | SSW 15 | S 14 |
Wave Graph  | ||||||||||||||||||||
 kJ | 73 | 72 | 188 | 133 | 183 | 154 | 249 | 147 | 125 | 124 | 300 | 241 | 227 | 208 | 206 | 206 | 169 | 79 | 144 | 98 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | cross-off | off | off | cross-off | cross-off | off | off | off | off | off | off | off |
High Tide | 4:45PM0.51m | 6:22AM0.59m | 4:50PM0.46m | 7:15AM0.55m | 4:34PM0.42m | 8:43AM0.51m | 11:28AM0.52m | 12:41PM0.55m | 1:16PM0.59m | 00:22AM0.29m | ||||||||||
Low Tide | 10:59PM0.04m | 11:55AM0.30m | 11:20PM0.05m | 12:49PM0.35m | 11:44PM0.08m | 00:14AM0.11m | 1:19AM0.15m | 4:23AM0.16m | 8:30PM0.23m | |||||||||||
 |  | |  | | | | | |  |  | | | | | | | | | | |
 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | 6:30 | — | — | 6:29 | — | — | 6:28 | — | — | 6:27 | — | — | 6:25 | — | — | 6:25 | — | — | 6:24 | — |
mm | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 | 27 | 28 | 26 | 27 | 27 | 26 | 26 | 27 | 25 |
Feels °C | 28 | 28 | 30 | 30 | 28 | 29 | 28 | 27 | 28 | 29 | 28 | 29 | 30 | 27 | 29 | 29 | 27 | 27 | 28 | 25 |
Swell 1 Height (m) Direction Period (s) | SW 22 | NE 8 | NNE 8 | SW 19 | SW 19 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 18 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 16 | SSW 15 | SSW 15 | S 14 |
| kJ | 73 | 31 | 33 | 133 | 183 | 154 | 249 | 147 | 125 | 124 | 300 | 241 | 227 | 208 | 206 | 206 | 169 | 79 | 144 | 98 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 21 | SW 20 | E 11 | E 11 | SSW 12 | SSW 11 | SSW 11 | SW 20 | SW 19 | W 10 | NW 11 | W 9 | W 9 | S 15 | S 15 | S 13 | SW 15 | N 11 | SW 15 |
| kJ | 30 | 72 | 188 | 22 | 36 | 14 | 12 | 12 | 61 | 57 | 2 | 5 | 2 | 2 | 4 | 4 | 3 | 77 | 2 | 35 |
Swell 3 Height (m) Direction Period (s) | SW 9 | SSW 13 | E 12 | SSW 12 | SSW 12 | N 9 | SW 8 | SW 8 | SW 11 | SW 8 | SW 10 | W 9 | NW 10 | NW 9 | W 9 | NW 11 | N 12 | N 11 | W 13 | W 12 |
| kJ | 3 | 17 | 25 | 15 | 15 | 7 | 3 | 3 | 5 | 3 | 4 | 2 | 4 | 3 | 2 | 4 | 3 | 3 | 3 | 12 |
Wind waves Height (m) Direction Period (s) | NE 8 | NE 5 | ENE 5 | NE 5 | NE 7 | ENE 10 | NE 5 | NE 10 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 |
| kJ | 191 | 18 | 10 | 62 | 107 | 267 | 127 | 392 | 501 | 497 | 336 | 250 | 277 | 250 | 262 | 306 | 256 | 257 | 251 | 257 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 29 | 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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