
Surf Forecasts:
Kalapaki Beach surf forecast from 8 Sep 2026:
- Best quality surf: Monday 7 Sep, 11PM (local time) - 31ft (9.5m), 15s period, S swell with onshore winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 31ft (9.5m), 15s period, S swell with 37,666 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 11PM (local time) - 31ft (9.5m), 15s period with S swell.
Best Forecast Surf Conditions for Kalapaki Beach this week:
The surf forecast for Kalapaki Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 11PM. The primary swell is predicted to be 9.5m and 15s period with a secondary swell of 2.5m and 10s. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Kalapaki Beach in the next 16 days are 9.5m 15s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 8s period and expected on Monday (Sep 14) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Mon 7th Sep) | 31ft (9.5m) 15s |
| Best Surf | 11PM (Mon 7th Sep) | 31ft (9.5m) 15s |
| Most Powerful | 11PM (Mon 7th Sep) | 31ft (9.5m) 15s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – this is a pretty bleak outlook for Kalapaki Beach over the next couple of weeks. We’ve got a long stretch without anything really worth paddling out for, so keep your expectations low.
Looking at the whole picture, the combo of strong, funky winds and messy, blown-out conditions just kills any chance of decent waves for the bulk of this period. The only real glimmer of hope is right at the very end, and that's a long way off.
The first week is essentially a write-off. Monday afternoon the 7th kicks off with a chunky 10ft SSW swell rolling in, but it’s getting smashed by a 31 mph cross-onshore wind, making it a complete mess. Moderate rain too – not worth it. The energy is monster, hitting 6642, but it’s totally unsurfable. Tuesday the 8th stays big and unruly, with a 12ft SW swell and fresh cross-shore winds. The combined energy (3250) is still huge, but the conditions are pure lumpy chop.
By Wednesday the 9th, the size drops to a tiny 3ft, and even though we get a bit of an offshore wind on Wednesday afternoon, the period is on the longer side at 13-14 seconds. The energy drops way down too (458-690), and the forecast still calls it marginal. Thursday through the following Monday (10th to 14th) is a desert of poor conditions – mostly small, weak swells with cross-onshore winds and chop. Energy readings bounce around between 66 and 711, but none of it comes together.
The second week doesn't look much better. From the 15th through to the 21st, we see a bit of a low-energy long-period swell from the SW, mostly in the 15-20 second range. But the wind stays stubbornly cross-onshore from the east or ENE, keeping the surface rough and bumpy. The wave heights are tiny, rarely pushing over 3ft, and the energy stays low, often under 500. It’s a frustrating run of poor surf.
Now, the one thing that might be worth keeping an eye on is the very end of the forecast. On Tuesday the 22nd, we finally see a change. The wind drops right off to nothing – glassy conditions by the afternoon, with a calm sea. The swell will be small, only 2ft from the SSW with a period of 13 seconds, and the energy is low at 231. But the expectation is for good surf conditions. It won't be big, but on a reef break like Kalapaki, that clean, glassy surface is a rare gift. The water is a warm 81°F, which is about average for the time of year, so at least you’ll be comfortable just floating around. Do remember the optimum direction is from the SSE, and this swell is coming from the SSW, so it might not be perfect, but with glass like that, you take what you can get.
So that's the story. A whole lot of nothing for the next two weeks, with one tiny window of clean, glassy goodness right on the last day. Keep the wax soft for that Tuesday, but don't hold your breath on everything else.
- Rusty
Short Range ForecastHeavy rain (total 46mm), heaviest during Mon night. Warm (max 28°C on Wed afternoon, min 25°C on Tue night). Winds decreasing (severe gales from the SSE on Mon night, light winds from the E by Wed night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Thu afternoon. Warm (max 26°C on Thu afternoon, min 24°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Mon 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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) | SSW 15 | SSW 13 | SW 9 | ENE 11 | ENE 11 | SSW 14 | SSW 13 | SSW 13 | ENE 8 | ENE 7 | ENE 7 | SW 16 | SW 15 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | SSW 14 |
Wave Graph | ||||||||||||||||||||
4394 | 23232 | 1927 | 771 | 521 | 336 | 253 | 178 | 244 | 268 | 231 | 198 | 229 | 379 | 173 | 128 | 123 | 119 | 110 | 79 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross | cross | cross-on | on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross |
High Tide | 1:36AM0.30m | 2:20PM0.68m | 2:21AM0.36m | 2:54PM0.66m | 3:04AM0.41m | 3:24PM0.61m | 3:47AM0.47m | 3:51PM0.55m | 4:29AM0.51m | 4:16PM0.48m | 5:11AM0.54m | 4:38PM0.41m | ||||||||
Low Tide | 8:46PM0.13m | 7:02AM0.02m | 9:05PM0.11m | 7:55AM0.03m | 9:25PM0.09m | 8:43AM0.05m | 9:45PM0.07m | 9:31AM0.09m | 10:06PM0.05m | 10:19AM0.13m | 10:28PM0.04m | 11:10AM0.18m | 10:50PM0.04m | |||||||
— | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | |
6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | |
mm | 11 | 33 | 2 | — | — | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 27 | 26 | 27 | 28 | 26 | 27 | 26 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 20 | 24 | 27 | 28 | 30 | 30 | 30 | 29 | 27 | 26 | 27 | 27 | 26 | 28 | 27 | 26 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | ENE 10 | ENE 11 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | SSW 13 | SSW 12 | SW 16 | SW 16 | SW 15 | SW 15 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | NE 8 |
4394 | 920 | 814 | 771 | 521 | 258 | 165 | 103 | 173 | 175 | 211 | 198 | 229 | 226 | 173 | 128 | 123 | 119 | 110 | 58 | |
Swell 2 Height (m) Direction Period (s) | NNW 13 | NNW 12 | SSW 15 | SSW 14 | SSW 8 | SSW 14 | SSW 13 | SSW 13 | E 12 | E 12 | E 12 | E 11 | ENE 11 | SSW 11 | NNE 8 | NE 9 | NE 9 | NE 8 | NE 8 | SSW 14 |
17 | 14 | 494 | 449 | 232 | 336 | 253 | 178 | 108 | 104 | 99 | 91 | 97 | 40 | 45 | 81 | 81 | 74 | 57 | 79 | |
Swell 3 Height (m) Direction Period (s) | — | — | SW 20 | NW 9 | SSW 14 | SSW 8 | S 7 | E 13 | SSW 17 | SW 18 | SSW 12 | S 12 | NNE 8 | SE 8 | SW 16 | SSW 16 | SSW 13 | SSW 15 | SSW 15 | ENE 9 |
— | — | 15 | 83 | 431 | 96 | 40 | 119 | 186 | 154 | 82 | 71 | 23 | 18 | 124 | 99 | 98 | 84 | 84 | 26 | |
Wind waves Height (m) Direction Period (s) | E 8 | SSW 13 | SW 9 | SSW 8 | — | — | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 11 | — | — | — | — | E 5 | E 4 |
2248 | 23232 | 1927 | 705 | — | — | — | — | 244 | 268 | 231 | 158 | 93 | 379 | — | — | — | — | 20 | 20 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 296 | 300 | 33 | 22 | 10 | 10 | 32 | 10 | 14 | 31 | 17 | 31 | 14 | 14 | 14 | 14 | 17 | 31 | 31 | 17 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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










