Surf Forecasts:
Number Fours surf forecast from 25 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
Best Forecast Surf Conditions for Number Fours this week:
The most powerful waves expected at Number Fours in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Thursday (Aug 27) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
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's cookin' for Number Fours over the next couple weeks.
Honestly, looking at the charts, it's a grim stretch ahead. We're not seeing any proper windows where everything comes together. For the first week or so, it’s mainly middling-to-small windswell with a persistent cross-off breeze, and the quality just isn't there. You'll be scratching for anything rideable.
We kick off Monday the 24th of August with a clean-ish 5ft swell from the ENE, but the period is a weak 7 seconds and the wind is a stiff 25 mph cross-off. That's messy, chunky water, not proper surf. The combined energy is weak (479), and the forecast is calling it poor. The water temperature is 81°, which is about average for this time of year. The pattern repeats through the week with wave heights between 2ft and 7ft, but honestly, the wind is always up and the direction never settles into a clean offshore. There’s a period of S swell starting Thursday the 27th, with 17-second periods, which is a proper groundswell, bringing higher energy (871). But the swell itself is only around 4ft, and that big period at a reef break like Number Fours... it’ll likely just close out or stand up too straight. It's still cross-off wind too, so it's a pass from me.
The only glimmer in this whole 16-day window is the morning of Monday the 31st of August. We see a bump up to 7ft from the ENE with a 7-second period. It’s only the second-best score of the whole run, but the wind drops to a moderate 12 mph cross-off and the energy is a bit more respectable (710). It might offer a few lumpy, pushy waves, but it’s still not clean surfing in my book. Certainly nothing worth calling a standout.
The week after that is the same story. The swell gets a little bigger into the first week of September, hitting 7ft from the ENE on the 1st, but with 22 mph winds and only 8-second periods. That's just a blown-out, bumpy mess. For the less experienced, anything over 5ft in those conditions is a handful, and it's not even good for experts. You'd be better off grabbing a kite if you're into that. The energy gets up to 1042, which is strong, but the wind is just ruining it.
Towards the 5th and 6th of September we see that groundswell again from the SSW, with long periods up to 20 seconds and solid energy (738). But the height is tiny, estimate 3ft, and you're still looking at that 22 mph cross-off. A long-period groundswell needs clean, offshore wind to shine, and that's not what we're getting here. It's a hard pass.
Bottom line: this stretch is a write-off. We have zero standout sessions. The wind is never good, the swell is either too small, too short-period, or mismatched with the conditions. For the time being, it's best to work on your wax collection and wait for the forecast to change. These dry spells happen, but they don't last forever.
Keep it real,
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Mon night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | |||||||||||||||
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) | ENE 7 | E 7 | E 7 | E 7 | ENE 7 | E 7 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
195 | 269 | 231 | 382 | 301 | 240 | 225 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 229 | 247 | 230 | 237 | 204 | 218 | 270 | |
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 | 2:26PM0.67m | 2:21AM0.29m | 2:56PM0.68m | 2:55AM0.33m | 3:24PM0.68m | 3:31AM0.37m | 3:53PM0.66m | 4:08AM0.41m | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | 5:30AM0.50m | 5:18PM0.51m | ||||||||
Low Tide | 9:35PM0.13m | 7:43AM0.06m | 9:53PM0.11m | 8:24AM0.05m | 10:12PM0.10m | 9:05AM0.06m | 10:32PM0.08m | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | 11:22AM0.14m | 11:42PM0.05m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 26 |
Feels °C | 24 | 26 | 26 | 24 | 22 | 23 | 22 | 23 | 23 | 24 | 23 | 23 | 23 | 24 | 22 | 22 | 22 | 22 | 24 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 7 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 14 | E 13 | NE 6 | SSW 16 | SSW 16 | SSW 15 |
68 | 269 | 127 | 85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 229 | 138 | 171 | 94 | 171 | 160 | 199 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | NNE 8 | SSW 12 | E 16 | SSW 11 | E 14 | E 12 | S 13 | S 12 | E 7 | E 12 | S 12 | S 11 |
166 | 156 | 19 | 146 | 81 | 81 | 165 | 135 | 137 | 7 | 47 | 20 | 38 | 61 | 48 | 85 | 76 | 100 | 103 | 100 | 59 | |
Swell 3 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSW 17 | SSE 12 | SSE 7 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | W 9 | N 8 | WNW 11 | NNE 7 | SSW 19 | ENE 15 | S 13 | S 13 | S 12 | S 12 | E 12 | ENE 11 |
50 | 47 | 94 | 30 | 9 | 109 | 27 | 7 | 50 | 7 | 5 | 11 | 10 | 36 | 73 | 89 | 89 | 102 | 69 | 67 | 40 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | — | E 7 | E 7 | ENE 7 | E 7 | ENE 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
195 | — | 231 | 382 | 301 | 240 | 225 | 170 | 188 | 155 | 135 | 139 | 127 | 161 | 214 | 247 | 230 | 237 | 204 | 218 | 270 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 39 | 31 | 31 | 39 | 39 | 31 | 39 | 39 | 31 | 31 | 44 | 31 | 32 | 39 | 33 | 39 | 39 | 31 | 31 | 31 | 2 |
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.











