Surf Forecasts:
Big Lefts surf forecast from 4 Sep 2026:
- Best quality surf: Monday 7 Sep, 2AM (local time) - 6.5ft (2.0m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 11ft (3.5m), 15s period, SW swell with 5,224 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 6.5ft (2.0m), 14s period with SSW swell.
Best Forecast Surf Conditions for Big Lefts this week:
The surf forecast for Big Lefts over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 2AM. The primary swell is predicted to be 2.0m and 14s period with a secondary swell of 2.1m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Big Lefts in the next 16 days are 3.5m 15s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 11s period and expected on Tuesday (Sep 08) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 6.5ft (2.0m) 14s |
| Best Surf | 2AM (Mon 7th Sep) | 6.5ft (2.0m) 14s |
| Most Powerful | 8PM (Mon 7th Sep) | 11ft (3.5m) 15s |
Table - best surf conditions forecast for Big Lefts over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s not sugarcoat it. This forecast is a fight for scraps. We’ve got a couple of weeks where the ocean is going to offer up some size, but the quality is going to be all over the place.
We start Friday the 4th with about 4ft of swell, but a strong 25 mph cross-offshore breeze is going to make it lumpy. Water temps are around 81°, which is pretty normal for this time of year. The weekend continues in the same vein, with 7ft to 7ft on Saturday the 5th and Sunday the 6th, but the winds stay fresh and the swell is disorganized. Not worth paddling out for, in my book.
Monday the 7th is a write-off. The swell jumps to nearly 10ft, but a strong SE onshore wind turns the place into a washing machine. The energy in the water is huge, but it's unusable. You’d be mad to go out there unless you’re towing in. The rest of that week is small and onshore, just mush on the reef.
The real hope is for Saturday the 19th. The models are hinting at a return to some size, around 6ft, from the ENE with a cross-off wind. The period is short, but if it cleans up, Big Lefts could still offer some fun, rippable waves. But that’s a long way out, so don't book the day off work yet. It's a "promising" call, not a certainty.
Overall, there’s no real gem in this window. Most of the time we’re dealing with either too much wind, or not enough swell, and the timing just never syncs up. It's one of those forecasts that'll have you checking the cam before you make the drive. Stick with it, the ocean always comes around.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Sun night. Warm (max 27°C on Sat afternoon, min 24°C on Sun night). Winds decreasing (strong winds from the ENE on Fri morning, light winds from the NE by Sun night). | Days 4-6 Weather SummaryModerate rain (total 10mm), heaviest on Mon morning. Warm (max 27°C on Mon morning, min 25°C on Wed night). Winds decreasing (fresh winds from the SSE on Mon night, calm by Tue night). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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) | S 12 | E 14 | E 14 | E 13 | ENE 13 | ENE 13 | ENE 12 | SSW 14 | SSW 14 | SW 14 | SW 15 | SW 12 | ENE 11 | ENE 11 | SSW 14 | SSW 14 | E 13 | E 13 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 521 | 577 | 1977 | 1609 | 1616 | 1568 | 1281 | 1484 | 1621 | 2090 | 4044 | 3196 | 724 | 550 | 295 | 273 | 219 | 176 | 214 | 192 | 285 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:58AM0.66m | 10:35PM0.19m | 12:05PM0.69m | 00:18AM0.21m | 1:00PM0.73m | 1:21AM0.26m | 1:47PM0.73m | 2:09AM0.32m | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | |||||||
Low Tide | 7:30PM0.17m | 3:46AM0.09m | 8:03PM0.13m | 5:11AM0.08m | 8:31PM0.10m | 6:25AM0.07m | 8:57PM0.08m | 7:26AM0.06m | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | ||||||||
 | |  | | | |  |  |  | |  |  | | |  | | | | | | | |
 | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — |
mm | — | — | — | — | — | — | — | 3 | 10 | 2 | 2 | 3 | 2 | 1 | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 27 | 25 | 26 | 27 | 25 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 23 | 22 | 22 | 23 | 25 | 24 | 25 | 25 | 27 | 28 | 28 | 27 | 28 | 28 | 31 | 29 | 27 | 26 | 23 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | S 12 | E 14 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 12 | E 12 | E 12 | SW 14 | SW 15 | SW 12 | W 11 | ENE 11 | ENE 9 | ENE 8 | ENE 8 | E 13 | E 12 | E 12 | ENE 13 |
| kJ | 521 | 577 | 504 | 657 | 794 | 762 | 469 | 1194 | 1290 | 2090 | 4044 | 3196 | 875 | 550 | 295 | 147 | 125 | 161 | 144 | 144 | 212 |
Swell 2 Height (m) Direction Period (s) | E 14 | S 11 | N 11 | SSW 17 | NNE 10 | SSE 10 | SSW 16 | SSW 14 | SSW 14 | ENE 12 | ENE 13 | ENE 12 | SSW 9 | SSW 8 | SSW 8 | SSW 14 | E 13 | SSW 13 | SSW 13 | SSW 12 | SW 16 |
| kJ | 357 | 244 | 10 | 116 | 19 | 19 | 641 | 1484 | 1621 | 1302 | 1344 | 1072 | 549 | 277 | 113 | 273 | 219 | 176 | 131 | 123 | 211 |
Swell 3 Height (m) Direction Period (s) | SW 12 | S 13 | SSW 20 | NNE 10 | S 22 | N 8 | SSE 10 | SSE 10 | SSW 18 | SSW 17 | SSW 17 | SSW 15 | ENE 11 | W 10 | SSW 14 | E 13 | SSW 13 | S 7 | SSW 16 | SW 18 | SSW 12 |
| kJ | 6 | 280 | 38 | 20 | 9 | 12 | 19 | 19 | 333 | 476 | 589 | 500 | 724 | 239 | 289 | 225 | 204 | 26 | 179 | 155 | 46 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | E 14 | E 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | — | — | SSE 8 | — | — | — | — | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 443 | 366 | 1977 | 1609 | 1616 | 1568 | 1281 | 737 | — | — | 197 | — | — | — | — | — | — | 128 | 214 | 192 | 285 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 42 | 37 | 29 | 29 | 29 | 3 | 30 | 43 | 0 | 42 | 126 | 45 | 81 | 21 | 18 | 0 | 1 | 29 | 29 | 36 | 0 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Big Lefts Surf forecast
The above surf forecast table for Big Lefts provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Big Lefts can be found by selecting the local surf guide option on the grey menu. Our Big Lefts 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 (Big Lefts) 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 Big Lefts 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.
Big Lefts is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.
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