Surf Forecasts:
Kalapaki Beach surf forecast from 24 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 2PM (local time) - 3.5ft (1.1m), 17s period, S swell with 702 kJ wave energy.
Best Forecast Surf Conditions for Kalapaki Beach this week:
The most powerful waves expected at Kalapaki Beach in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break this down in feet and miles per hour.
The opening stretch is pretty grim. From now through the end of August, Kalapaki Beach is getting beat up by cross-shore winds around 15 to 16 mph, with waves running 5 to 6 feet but with a short, weak period of 6 to 7 seconds. The combined energy readings stay in the 500 to 700 range, which is weak. It’s choppy, lumpy, and just not worth suiting up for. A little glimmer on the 27th of August (Thursday morning) with a long-period S’ly swell at 4 feet and 17 seconds, energy jumping to 930, but the wind is still cross, and it’s small.
The big one, and I mean the one to circle on your calendar, lands on the 6th of September (Sunday afternoon). That ENE swell comes in at 10 feet with a 12-second period, and the combined energy skyrockets to 3140—that is serious, heavy water. Wind is NE at 15 mph, which is cross, but for a reef like Kalapaki, that size and period will produce powerful, grunty lines. At 10 feet, this is expert-only territory. The place is a beginner-friendly reef normally, but not that day.
The 5th of September (Saturday) is a decent backup wave: 7 feet with a 12-second period and energy over 1300, but still cross wind and marginal quality. The 2nd of September also shows waves around 7 to 7 feet, but the period is only 8 seconds and the wind is cross, so it’s average at best.
Bottom line: the first week is a total dud. The 6th of September is the standout—big, powerful, and well worth the wait if you’ve got the skills. Crowds are often here, so you won’t be alone.
Rusty.
Short Range ForecastLight rain (total 7mm), mostly falling on Mon night. Warm (max 27°C on Sun afternoon, min 24°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Thu morning. Warm (max 26°C on Wed afternoon, min 24°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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 | ENE 7 | ENE 7 | ENE 6 | E 6 | ENE 6 | E 7 | E 7 | E 7 | S 18 | S 19 | S 17 | S 17 | S 15 | S 14 | S 14 | S 14 | ENE 7 | S 13 | ENE 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 257 | 316 | 232 | 200 | 220 | 253 | 351 | 270 | 306 | 395 | 573 | 699 | 553 | 567 | 334 | 394 | 294 | 247 | 215 | 278 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on |
High Tide | 1:16AM0.25m | 2:19PM0.63m | 1:51AM0.28m | 2:48PM0.64m | 2:25AM0.31m | 3:14PM0.64m | 3:02AM0.35m | 3:38PM0.62m | 3:40AM0.38m | 4:02PM0.59m | 4:22AM0.42m | 4:25PM0.55m | ||||||||
Low Tide | 9:16PM0.18m | 6:37AM0.05m | 9:23PM0.17m | 7:21AM0.04m | 9:34PM0.16m | 8:01AM0.03m | 9:50PM0.13m | 8:40AM0.04m | 10:08PM0.11m | 9:19AM0.06m | 10:29PM0.08m | 10:02AM0.10m | 10:52PM0.06m | |||||||
 |  |  | |  |  | |  | | | | | |  | | | |  | | | |
 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:55 | — |
mm | — | — | 2 | — | 4 | 1 | — | — | — | — | — | 1 | 1 | 2 | 1 | 1 | 1 | — | — | 1 |
Temp °C | 27 | 25 | 27 | 27 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 26 | 25 | 28 | 28 | 28 | 26 | 27 | 25 | 25 | 25 | 24 | 26 | 25 | 26 | 26 | 25 | 25 | 24 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | SE 9 | SE 8 | SE 8 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 17 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 12 |
| kJ | 191 | 183 | 163 | 106 | 60 | 59 | 193 | 167 | 215 | 395 | 573 | 699 | 553 | 567 | 334 | 394 | 294 | 219 | 215 | 141 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 10 | SSW 13 | SSW 12 | SSW 16 | SSW 12 | SSE 9 | S 18 | SSW 13 | SSW 13 | SSW 12 | S 12 | SE 7 | SSW 11 | E 14 | E 15 | E 14 | E 14 | E 13 |
| kJ | 67 | 48 | 60 | 156 | 121 | 201 | 85 | 53 | 167 | 133 | 135 | 79 | 73 | 13 | 40 | 33 | 38 | 66 | 97 | 126 |
Swell 3 Height (m) Direction Period (s) | NW 10 | SSE 13 | S 12 | SSW 18 | SSW 16 | SSW 12 | SSE 13 | SSW 12 | SSE 12 | SE 8 | W 10 | N 8 | NNE 8 | NNE 7 | NNE 7 | SSW 19 | SW 19 | SW 18 | SSW 17 | SSW 17 |
| kJ | 24 | 58 | 80 | 61 | 153 | 83 | 33 | 79 | 14 | 35 | 8 | 5 | 6 | 11 | 15 | 35 | 90 | 80 | 115 | 186 |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 6 | E 6 | ENE 6 | E 7 | E 7 | E 7 | ENE 7 | E 6 | E 7 | E 6 | ENE 6 | E 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
| kJ | 257 | 316 | 232 | 200 | 220 | 253 | 351 | 270 | 306 | 219 | 188 | 152 | 119 | 104 | 113 | 145 | 232 | 247 | 186 | 278 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 31 | 17 | 31 | 17 | 17 | 39 | 33 | 17 | 33 | 17 | 17 | 31 | 17 | 17 | 31 | 17 | 47 | 33 | 17 | 39 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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Information about the Kalapaki Beach Surf forecast
The above surf forecast table for Kalapaki Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kalapaki Beach can be found by selecting the local surf guide option on the grey menu. Our Kalapaki Beach 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 (Kalapaki Beach) 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 Kalapaki Beach 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.
Are you planning a vacation in Kaua'i? If you are looking for accommodation near Kalapaki Beach, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 1 km (1 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 3 km (2 miles) away
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