
Surf Forecasts:
Number Fours surf forecast from 27 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 8PM (local time) - 8ft (2.5m), 12s period, E swell with offshore winds.
- Most powerful swell: Tuesday 28 Jul, 5PM (local time) - 8ft (2.5m), 13s period, E swell with 2,188 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 8PM (local time) - 8ft (2.5m), 12s period with E 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 Tuesday (Jul 28) at 8PM. The primary swell is predicted to be 2.5m and 12s 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 2.5m 13s and forecast to arrive on Tuesday (Jul 28) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Monday (Jul 27) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Tue 28th Jul) | 8ft (2.5m) 12s |
| Best Surf | 8PM (Tue 28th Jul) | 8ft (2.5m) 12s |
| Most Powerful | 5PM (Tue 28th Jul) | 8ft (2.5m) 13s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, Rusty here, let’s have a look at what Number Fours is cooking up for the next couple of weeks.
Alright, the outlook for Number Fours is a bit of a mixed bag. We’ve got some solid swell energy coming through, but the wind is going to be a persistent factor, mostly blowing from the east-northeast, which is a cross-offshore breeze here. That’s not the end of the world, but it’s not the clean glass we’d all love.
The action kicks off on Sunday, 26 July. The swell is a modest 4ft from the East, with a period of 14 seconds – that’s a proper long-period groundswell. The combined energy is a whopping 1222, so there’s plenty of power in the water. It’s a cross-off breeze, so the lines should be pretty clean. The water temperature is 80°F with a tiny anomaly, so it’s bang on average for this time of year. It’s a surfable day, but it’s not the full story.
The real standout, the one you’ve been waiting for, is Tuesday, 28 July. The morning brings a solid 7ft swell from the East, with a 13-second period. The energy is huge at 1605. The wind is a moderate cross-off from the NNE, keeping things clean. This is a big, powerful swell. 7ft is pushing above beginner territory, but for an intermediate surfer, this is where it gets good. I’d be looking at the Tuesday morning session. The afternoon bumps up to 8ft, but the wind freshens to 19 mph, making it a bit more of a battle.
Wednesday, 29 July is interesting. The wind finally swings to the SSW, giving us a proper offshore breeze at 6 mph. The swell drops to 7ft from the ENE, period 10 seconds. The energy is still strong at 930. This is about as clean as it’s going to get, but the shorter period means less push between sets. It’s a quality window, but the swell is a bit more jumbled.
After that, the wind sticks to a strong ENE breeze for the rest of the week and into the start of August, with the swell dropping into the 5ft to 8ft range. The period also drops to 8 seconds, which is short-period wind swell. The energy values are still moderate to strong, but the quality is mediocre. The wind is strong, blowing 19 to 28 mph. For a reef break like Number Fours, this setup is more interesting for the kite surfers than for us paddling. It’s going to be choppy and tough.
We hit a dry spell from around Friday, 31 July through to Saturday, 8 August. The swell is inconsistent, and the wind is relentless. The scores are poor, and honestly, it’s a blank run. The mornings of Tuesday, 4 August, show a bit of hope with a 6ft, 12-second groundswell, but the ENE wind is still moderate, and the energy is just 959. It’s a marginal call.
The final flicker of hope comes on Sunday, 9 August. We get a 7ft swell from the East, but the period is a low 7 seconds. The energy is moderate at 1004, but with a fresh 22 mph cross-off wind, it’s going to be a messy, choppy affair. Not the one to pin your hopes on.
So, the standout is definitely Tuesday, 28 July. The morning session, with that 7ft, 13-second groundswell from the East, and the clean NNE cross-off, is the best you’re going to get. The Wednesday morning offshore is a close second, but the swell is a bit smaller and shorter. After that, it’s a long wait for anything decent.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 28°C on Tue afternoon, min 24°C on Sun night). Winds decreasing (fresh winds from the ENE on Sun night, light winds from the NNW by Tue night). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed night, min 25°C on Wed night). Winds increasing (light winds from the SE on Wed night, strong winds from the ENE by Sat morning). | ||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||
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) | E 14 | E 14 | E 13 | E 13 | E 13 | E 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||
697 | 631 | 792 | 1401 | 1642 | 2188 | 1706 | 838 | 508 | 291 | 253 | 222 | 327 | 427 | 403 | 935 | 871 | 933 | 1026 | |
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 | off | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:32AM0.21m | 3:29PM0.70m | 3:10AM0.23m | 3:59PM0.70m | 3:49AM0.25m | 4:29PM0.70m | 4:28AM0.28m | 4:58PM0.68m | 5:11AM0.31m | 5:26PM0.64m | 5:57AM0.34m | 5:55PM0.59m | |||||||
Low Tide | 10:27PM0.11m | 7:51AM0.01m | 10:49PM0.10m | 8:31AM0.01m | 11:11PM0.09m | 9:09AM0.01m | 11:34PM0.08m | 9:48AM0.03m | 11:58PM0.07m | 10:29AM0.06m | 00:22AM0.06m | 11:14AM0.11m | 00:48AM0.05m | ||||||
— | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
7:13 | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 26 | 26 | 25 | 27 | 28 | 26 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 22 | 24 | 24 | 24 | 28 | 28 | 27 | 29 | 29 | 30 | 27 | 28 | 25 | 24 | 22 | 22 | 21 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 14 | E 13 | E 13 | E 13 | E 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | S 14 | ENE 8 | S 13 | S 12 | E 15 | E 15 | E 15 | E 14 | E 14 |
697 | 631 | 792 | 1401 | 1642 | 2188 | 1706 | 838 | 508 | 291 | 181 | 210 | 163 | 113 | 208 | 205 | 267 | 264 | 334 | |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | S 14 | SSW 14 | S 14 | S 14 | S 14 | SW 18 | S 13 | SSW 16 | E 15 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 |
333 | 228 | 222 | 213 | 143 | 179 | 195 | 195 | 195 | 239 | 154 | 222 | 177 | 159 | 239 | 174 | 127 | 123 | 133 | |
Swell 3 Height (m) Direction Period (s) | SE 11 | S 10 | S 10 | NE 10 | SSE 10 | SSE 10 | NNE 9 | SW 21 | SSW 20 | SW 19 | E 19 | SSW 18 | E 16 | SW 16 | S 12 | SSW 12 | SSW 12 | S 11 | S 11 |
5 | 8 | 9 | 45 | 10 | 19 | 44 | 17 | 37 | 95 | 29 | 207 | 127 | 206 | 106 | 47 | 46 | 39 | 22 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | NE 7 | NE 7 | NNE 7 | NNE 7 | NNE 9 | — | SE 3 | SE 4 | — | ENE 8 | — | ENE 7 | ENE 8 | ENE 7 | E 8 | ENE 8 | ENE 8 | ENE 8 |
302 | 301 | 273 | 120 | 142 | 190 | — | 3 | 5 | — | 253 | — | 327 | 427 | 403 | 935 | 871 | 933 | 1026 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 42 | 31 | 31 | 31 | 2 | 1 | 28 | 0 | 16 | 19 | 1 | 32 | 31 | 33 | 42 | 46 | 126 | 128 | 128 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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.










