
Surf Forecasts:
Number Fours surf forecast from 24 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 8AM (local time) - 11ft (3.5m), 11s period, ENE swell with offshore winds.
- Most powerful swell: Wednesday 29 Jul, 8AM (local time) - 11ft (3.5m), 11s period, ENE swell with 3,131 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 8AM (local time) - 11ft (3.5m), 11s period with ENE swell.
Best Forecast Surf Conditions for Number Fours this week:
The surf forecast for Number Fours over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 29) at 8AM. The primary swell is predicted to be 3.5m and 11s period with a secondary swell of 0.7m and 14s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Number Fours in the next 16 days are 3.5m 11s and forecast to arrive on Wednesday (Jul 29) 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 2.2m 8s period and expected on Saturday (Jul 25) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 29th Jul) | 11ft (3.5m) 11s |
| Best Surf | 8AM (Wed 29th Jul) | 11ft (3.5m) 11s |
| Most Powerful | 8AM (Wed 29th Jul) | 11ft (3.5m) 11s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it.
Number Fours is a reef setup that’s exposed to the swell, so when it gets a clean line, it can really fire. This whole 16-day window is a bit of a mixed bag though. We’ve got a solid run of swell, but a lot of it comes wrapped in strong cross-offshore winds that keep the surface clean, but the conditions are often described as marginal. The first few days are a write-off for quality surfing, so we’re looking at a bit of a slow start.
The first real hopeful sign pops up on Sunday, July 26th. We’ve got a long period groundswell rolling in from the SSW at 3 ft, with a period of 16 seconds. That’s a proper long period, which will give the reef at Number Fours some nice, lined-up waves, but with that period, it can be a bit straight at times. The wind is a cross-off from the ENE at 19 mph, keeping things clean. The combined energy is strong (1245).
The standout of the whole run has to be Wednesday, July 29th. That morning, a big pulse of swell hits, with a solid 12 ft from the ENE, period of 11 seconds. The wind is light from the north-northeast at only 9 mph, a gentle breeze. That’s about as good as it gets for a reef – a big, powerful groundswell with light winds. The combined energy is massive (2727). This is definitely for experienced surfers only, as 12 ft is well into expert territory. The afternoon turns ugly, though, with a cross-onshore wind and choppy conditions, so the morning window is the one to chase.
After that, the swell drops back, but we get a few more days of manageable, clean surf in the 3 ft to 6 ft range. The wind stays cross-off, but it’s pretty strong, so the wave quality remains just okay. The period drops to 7-8 seconds, which is short period windswell, so the waves will be a bit weaker and more crumbly.
Then there’s a bit of a lull, with a few days of poor surf ratings. Things pick up again on Sunday, August 2nd, with a return of a long period, 16-second swell from the east at 4 ft. The combined energy is strong (1105). The wind is still a stiff cross-off at 22 mph, so it’ll be clean but a bit bumpy. This pattern of clean, modest swell continues through the first week of August, with the standout being a steady 6 ft pulse from the ENE on Wednesday, August 5th, with a decent 12-second period, and moderate cross-off winds. The combined energy is moderate (1023).
The very end of the forecast, on Saturday, August 8th, sees a tiny, long period SSW groundswell of 2 ft with a 19-second period, but the wind goes cross-shore, and the energy is weak (255). It’s a small, tricky day.
Overall, if you’re a confident surfer, the morning of July 29th is the absolute standout. It’s a big, powerful, clean swell. For the more consistent, everyday surfer, the period from August 2nd through to August 6th offers the best mix of clean, rideable surf with moderate crowds possible at Number Fours. The rest of the window is mostly about waiting for the right tide and the cleanest window.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 24°C on Thu night). Mainly strong winds. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Wed morning. Warm (max 27°C on Tue afternoon, min 24°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | ||||||||||||||
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 18 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | SSW 18 | ENE 8 | ENE 8 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 | ENE 12 | ENE 11 | ENE 10 | ENE 8 |
Wave Graph | |||||||||||||||||||
464 | 499 | 428 | 512 | 392 | 572 | 547 | 469 | 407 | 472 | 515 | 485 | 946 | 957 | 1118 | 2281 | 2523 | 1170 | 541 | |
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-on | cross |
High Tide | 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 | 3:59PM0.70m | 3:49AM0.25m | 4:29PM0.70m | 4:28AM0.28m | ||||||
Low Tide | 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 | 8:31AM0.01m | 11:11PM0.09m | 9:09AM0.01m | 11:34PM0.08m | ||||||
— | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | |
7:14 | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 4 | 8 |
Temp °C | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 27 | 25 | 26 | 26 | 26 |
Feels °C | 22 | 21 | 21 | 22 | 22 | 23 | 22 | 23 | 22 | 22 | 22 | 24 | 23 | 25 | 26 | 24 | 29 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 18 | SSW 17 | SSW 16 | SSW 19 | SSW 18 | SSW 18 | SSW 16 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 | SSW 14 | ENE 11 | ENE 10 | SSW 14 |
464 | 329 | 340 | 232 | 391 | 572 | 547 | 469 | 407 | 472 | 515 | 485 | 946 | 957 | 1118 | 147 | 2523 | 1170 | 192 | |
Swell 2 Height (m) Direction Period (s) | S 11 | S 12 | S 12 | S 20 | SSW 16 | S 11 | E 15 | E 15 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | S 14 | SSE 10 | S 14 | S 14 | SSE 6 |
55 | 143 | 102 | 296 | 223 | 61 | 72 | 348 | 341 | 333 | 225 | 222 | 213 | 143 | 179 | 9 | 192 | 192 | 17 | |
Swell 3 Height (m) Direction Period (s) | S 13 | SSW 15 | S 21 | S 12 | S 11 | E 13 | E 12 | S 11 | S 11 | S 10 | S 10 | SSE 10 | NNE 10 | SSE 10 | — | SW 21 | S 10 | SSW 20 | SW 19 |
85 | 93 | 231 | 100 | 63 | 54 | 47 | 20 | 20 | 8 | 8 | 11 | 63 | 10 | — | 18 | 8 | 37 | 58 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | NE 7 | NE 7 | NNE 6 | NNE 7 | ENE 12 | SE 10 | SSE 5 | ENE 8 |
420 | 499 | 428 | 512 | 392 | 477 | 522 | 408 | 352 | 294 | 257 | 240 | 106 | 100 | 170 | 2281 | 4 | 27 | 541 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 33 | 46 | 46 | 32 | 39 | 48 | 31 | 32 | 34 | 31 | 31 | 126 | 1 | 28 | 156 | 2 | 1 | 34 | 1 |
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 Number Fours Surf forecast
The above surf forecast table for Number Fours provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Fours can be found by selecting the local surf guide option on the grey menu. Our Number Fours 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 (Number Fours) 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 Number Fours 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.
Number Fours is 5 km (3 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.










