Surf Forecasts:
The Dump surf forecast from 18 Sep 2026:
- Best quality surf: Tuesday 22 Sep, 8AM (local time) - 5ft (1.6m), 12s period, W swell with glassy winds.
- Most powerful swell: Monday 21 Sep, 8PM (local time) - 6ft (1.8m), 13s period, W swell with 1,104 kJ wave energy.
- Next surfable swell (1★+): Friday 18 Sep, 8PM (local time) - 1.5ft (0.4m), 20s period with SW swell.
Best Forecast Surf Conditions for The Dump this week:
The surf forecast for The Dump over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 18) at 8PM. The primary swell is predicted to be 0.4m and 20s period with a secondary swell of 0.6m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at The Dump in the next 16 days are 1.8m 13s and forecast to arrive on Monday (Sep 21) at 8PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 18th Sep) | 1.5ft (0.4m) 20s |
| Best Surf | 8AM (Tue 22nd Sep) | 5ft (1.6m) 12s |
| Most Powerful | 8PM (Mon 21st Sep) | 6ft (1.8m) 13s |
Table - best surf conditions forecast for The Dump over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 15°C on Fri afternoon, min 11°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Mon afternoon, min 12°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | Thursday 24 | |||||||||||||||
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) | SW 16 | SW 20 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 19 | SW 18 | W 13 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | SW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 124 | 137 | 236 | 133 | 130 | 197 | 307 | 255 | 284 | 300 | 1001 | 869 | 615 | 543 | 345 | 451 | 441 | 327 | 239 | 240 | 171 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | glassy | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | glassy | glassy | cross-on | on | cross-on | on | glassy |
High Tide | 5:34PM2.01m | 9:31AM1.47m | 6:47PM1.93m | 10:39AM1.55m | 8:24PM1.91m | 11:16AM1.66m | 9:43PM1.98m | 11:43AM1.78m | 10:40PM2.07m | 12:07PM1.92m | 11:28PM2.16m | 12:28PM2.07m | 00:12AM2.22m | ||||||||
Low Tide | 10:56AM1.31m | 2:01AM0.31m | 11:49AM1.42m | 3:14AM0.30m | 2:00PM1.46m | 4:13AM0.24m | 4:07PM1.34m | 4:59AM0.17m | 5:02PM1.15m | 5:36AM0.13m | 5:45PM0.92m | 6:09AM0.12m | 6:24PM0.67m | ||||||||
 | |  | | |  |  | | | | |  | | | | | | | | | | |
 | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:07 | — | — |
 | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:16 | — | — | 7:15 | — | — | 7:12 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 15 | 13 | 14 | 14 | 12 | 12 | 13 | 13 | 14 | 15 | 13 | 13 | 13 | 12 | 14 | 14 | 13 | 13 | 13 | 12 |
Feels °C | 13 | 13 | 13 | 14 | 13 | 10 | 10 | 11 | 11 | 13 | 13 | 10 | 12 | 10 | 10 | 13 | 12 | 12 | 12 | 10 | 10 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | W 7 | W 9 | SW 19 | SW 19 | SW 18 | SW 18 | W 9 | W 8 | W 8 | W 13 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | W 10 | W 10 | W 10 | W 7 |
| kJ | 79 | 49 | 57 | 133 | 130 | 197 | 307 | 78 | 109 | 100 | 1001 | 869 | 615 | 543 | 345 | 451 | 441 | 327 | 239 | 240 | 124 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 19 | WNW 8 | WNW 8 | WNW 7 | WNW 8 | SW 18 | SW 19 | W 15 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | WNW 10 |
| kJ | 124 | 64 | 236 | 22 | 20 | 18 | 19 | 255 | 284 | 275 | 366 | 290 | 326 | 314 | 306 | 291 | 299 | 242 | 178 | 171 | 94 |
Swell 3 Height (m) Direction Period (s) | SW 21 | SW 20 | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | SW 13 | SW 18 | SW 12 | S 12 | S 12 | SW 11 | — | — | — | — | WNW 11 | W 15 | SW 15 |
| kJ | 72 | 137 | 53 | 53 | 53 | 27 | 45 | 45 | 27 | 300 | 5 | 3 | 3 | 5 | — | — | — | — | 45 | 4 | 171 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 4 | 0 | 0 | 1290 | 99 | 212 | 1289 | 4 | 47 | 737 | 16 | 99 | 974 | 0 | 0 | 47 | 16 | 16 | 53 | 0 |
Best forecast wave conditions in Washington State | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our The Dump surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the The Dump Surf forecast
The above surf forecast table for The Dump provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at The Dump can be found by selecting the local surf guide option on the grey menu. Our The Dump 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 (The Dump) 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 The Dump 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.
The Dump is 83 km (52 miles) from Duncan. If you plan a vacation in Washington State, look for hotels and other accommodation in Duncan. Duncan has rooms for a wide range of budgets as well as car hire and transport links.
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