
Surf Forecasts:
Big Lefts surf forecast from 21 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 8AM (local time) - 6ft (1.8m), 13s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 2PM (local time) - 6ft (1.8m), 14s period, E swell with 1,321 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 8AM (local time) - 6ft (1.8m), 13s period with E 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 Tuesday (Jul 28) at 8AM. The primary swell is predicted to be 1.8m and 13s period. 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 1.8m 14s and forecast to arrive on Monday (Jul 27) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 8s period and expected on Saturday (Jul 25) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 28th Jul) | 6ft (1.8m) 13s |
| Best Surf | 8AM (Tue 28th Jul) | 6ft (1.8m) 13s |
| Most Powerful | 2PM (Mon 27th Jul) | 6ft (1.8m) 14s |
Table - best surf conditions forecast for Big Lefts over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’m looking at what’s on offer for the next couple of weeks. Only one spot in the frame, and it’s a proper reef setup: Big Lefts. It’s an advanced wave, pretty consistent, and it’s got that exposed feel for the SSE swell. The water temp is sitting about 80°, which is pretty normal for this time of year, nothing weird going on there.
First up, we’ve got a bit of a slow start. Tuesday the 21st is a write-off – tiny swell, 3ft from the S, with a long 14-second period, and a moderate breeze blowing cross-off. The energy’s there (537), but it’s just not doing much. Wednesday the 22nd to Friday the 24th is a real lull. Swell drops to 2ft–2ft, super long period (20–24 seconds), but the wind is a fresh cross-off, and there’s just no push. The combined energy dips into the 800s, but it’s all wind and no wave. Not worth paddling out for.
Now, Saturday the 25th and Sunday the 26th, things start to wake up. Saturday morning has a 7ft swell from the ENE, but it’s a short 7-second period – that’s wind swell, junk. The energy is high (1146), but it’s not going to shape up well on a reef. Saturday afternoon switches back to a 3ft SSW swell, still long period (18s), but it’s marginal. Sunday the 26th is a bit better: 4ft–5ft from the E, period 15–16 seconds, fresh cross-off wind. The energy climbs to 1462, but it’s still a marginal call.
The standout window is Monday the 27th through Wednesday the 29th. Monday sees 5ft–6ft from the E, with a 14-second period, and the energy is pumping over 1500. It’s still cross-off wind, so it’s clean, but the size is creeping up. Tuesday the 28th is the real highlight. The wind drops to a light breeze – just 6 mph from the NE, cross-off, and the swell holds at 6ft from the E, 13 seconds. The energy is 1281, and the conditions are excellent for experienced surfers. This is the one to point your board at. The waves will have good shape, long lines, and that light wind will keep it glassy. Expect crowds, though, as it’s a spot that can get busy.
Thursday the 30th starts to drop off – 5ft from the ENE, period dropping to 10 seconds, wind picking up again. Friday the 31st is flat, with 2ft SSW swell, not worth the walk. Then we get into early August, and the swell comes back with a punch. Saturday the 1st and Sunday the 2nd see 8ft–10ft from the ENE, but with a short 8-second period and a fresh cross-off wind. That’s big, messy, and only for experts. The energy is big (over 1000), but at 10ft, it’s too much for most. Monday the 3rd and Tuesday the 4th are still sizeable (5ft–7ft), but the period is short and the wind is a light cross or cross-off. Bottom line: the best bet is Tuesday the 28th, with that clean, solid E swell and light wind.
Rusty out.
Short Range ForecastLight rain (total 3mm), mostly falling on Tue morning. Warm (max 26°C on Tue morning, min 24°C on Wed night). Mainly strong winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 26°C on Fri afternoon, min 24°C on Fri morning). Mainly strong winds. | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 14 | S 14 | S 13 | SSW 24 | SSW 23 | SSW 22 | ENE 7 | E 7 | SSW 18 | SSW 18 | SSW 17 | ENE 7 | ENE 8 | SSW 18 | ENE 8 | E 15 | E 16 | E 16 | E 14 | E 14 | E 14 |
Wave Graph | |||||||||||||||||||||
329 | 311 | 277 | 317 | 426 | 363 | 412 | 395 | 503 | 329 | 349 | 482 | 471 | 572 | 547 | 563 | 959 | 1206 | 1055 | 1321 | 1297 | |
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-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 11:13AM0.49m | 8:56PM0.27m | 12:12PM0.54m | 10:06PM0.22m | 1:02PM0.59m | 11:46PM0.19m | 1:44PM0.62m | 00:59AM0.18m | 2:22PM0.66m | 1:51AM0.19m | 2:56PM0.68m | 2:32AM0.21m | 3:29PM0.70m | 3:10AM0.23m | |||||||
Low Tide | 6:20PM0.26m | 4:02AM0.05m | 8:25PM0.21m | 9:13PM0.17m | 5:34AM0.05m | 9:41PM0.14m | 6:23AM0.04m | 10:05PM0.12m | 7:08AM0.02m | 10:27PM0.11m | 7:51AM0.01m | 10:49PM0.10m | |||||||||
6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
— | 7:14 | — | — | 7:14 | — | — | 7:14 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | |
mm | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 1 | — | — |
Temp °C | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 26 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 24 | 23 | 22 | 23 | 21 | 21 | 21 | 21 | 23 | 21 | 22 | 22 | 23 | 23 | 22 | 23 | 23 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | NE 7 | ENE 7 | S 13 | E 11 | S 13 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | E 15 | E 16 | E 16 | E 14 | E 14 | E 14 |
136 | 67 | 140 | 215 | 123 | 157 | 412 | 395 | 464 | 329 | 340 | 232 | 391 | 572 | 547 | 563 | 959 | 1206 | 1055 | 1321 | 1297 | |
Swell 2 Height (m) Direction Period (s) | S 14 | S 14 | S 13 | E 12 | SSW 23 | SSW 22 | S 12 | S 11 | S 11 | S 12 | S 12 | S 20 | SSW 16 | S 11 | E 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 |
329 | 311 | 277 | 138 | 426 | 363 | 97 | 90 | 56 | 143 | 104 | 296 | 223 | 64 | 249 | 469 | 341 | 333 | 228 | 222 | 213 | |
Swell 3 Height (m) Direction Period (s) | SW 17 | E 7 | E 13 | SSW 24 | S 13 | SW 18 | SSW 16 | SW 16 | S 13 | SSW 16 | S 21 | S 12 | S 11 | E 13 | S 11 | SSW 11 | SSW 10 | SW 9 | SW 8 | SW 8 | SSE 10 |
72 | 46 | 121 | 317 | 125 | 150 | 100 | 127 | 85 | 94 | 231 | 100 | 61 | 55 | 37 | 38 | 36 | 21 | 11 | 11 | 10 | |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 7 | ENE 7 | ENE 6 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | NE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 7 | NE 8 |
— | — | — | 192 | 166 | 201 | 395 | 388 | 503 | 293 | 349 | 482 | 471 | 362 | 493 | 392 | 322 | 287 | 229 | 136 | 136 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 29 | 36 | 32 | 29 | 37 | 39 | 29 | 36 | 39 | 30 | 29 | 39 | 29 | 29 | 128 | 29 | 0 | 29 | 0 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
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 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.










