Surf Forecasts:
The Dump surf forecast from 20 Aug 2026:
- Best quality surf: Thursday 20 Aug, 2AM (local time) - 4ft (1.2m), 12s period, W swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 5AM (local time) - 4.5ft (1.3m), 11s period, W swell with 418 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 2AM (local time) - 4ft (1.2m), 12s period with W 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 Thursday (Aug 20) at 2AM. The primary swell is predicted to be 1.2m and 12s period with a secondary swell of 0.5m and 14s. 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 1.3m 11s and forecast to arrive on Thursday (Aug 20) at 5AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 4s period and expected on Saturday (Aug 22) at 8PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 20th Aug) | 4ft (1.2m) 12s |
| Best Surf | 2AM (Thu 20th Aug) | 4ft (1.2m) 12s |
| Most Powerful | 5AM (Thu 20th Aug) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for The Dump over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 17°C on Fri morning, min 13°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sat night. Very mild (max 17°C on Mon morning, min 13°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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) | W 12 | W 12 | W 11 | W 11 | W 9 | W 9 | W 10 | SSW 14 | W 8 | WNW 8 | W 8 | W 8 | W 7 | SW 19 | SW 18 | SW 18 | SW 18 | WSW 16 | SW 17 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 271 | 376 | 388 | 326 | 190 | 162 | 148 | 133 | 113 | 115 | 105 | 74 | 79 | 127 | 112 | 155 | 154 | 177 | 140 | 169 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | on | glassy | glassy | cross-on | glassy | cross-off | cross-off | cross-off | glassy | cross-on | glassy | cross-off | on | cross | cross-on | cross-on | cross-on |
High Tide | 5:54PM2.14m | 8:13AM1.33m | 6:42PM2.05m | 9:58AM1.34m | 7:49PM2.01m | 11:19AM1.42m | 9:06PM2.02m | 12:03PM1.52m | 10:11PM2.10m | 12:33PM1.62m | 11:03PM2.20m | 1:00PM1.73m | 11:47PM2.28m | |||||||
Low Tide | 1:42AM0.28m | 11:39AM1.14m | 2:55AM0.25m | 12:19PM1.28m | 4:03AM0.18m | 1:44PM1.37m | 4:59AM0.07m | 4:02PM1.36m | 5:44AM-0.03m | 5:11PM1.25m | 6:22AM-0.12m | 5:58PM1.10m | ||||||||
 |  |  | | | | |  | |  |  |  | | | | | | | | | |
 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — |
 | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:20 | — | — | 8:17 | — | — | 8:15 | — | — | 8:14 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 13 | 16 | 16 | 15 | 17 | 16 | 15 | 15 | 15 | 15 | 14 | 15 | 14 | 17 | 17 | 14 | 14 | 14 | 12 |
Feels °C | 14 | 12 | 16 | 16 | 14 | 17 | 15 | 15 | 14 | 14 | 15 | 14 | 15 | 13 | 16 | 16 | 13 | 13 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | W 12 | W 12 | W 11 | W 11 | W 9 | W 9 | W 10 | W 9 | W 8 | WNW 8 | W 8 | W 8 | W 7 | W 7 | W 7 | W 7 | W 6 | W 7 | W 6 | W 6 |
| kJ | 271 | 376 | 388 | 326 | 190 | 162 | 148 | 127 | 113 | 115 | 105 | 74 | 79 | 51 | 38 | 34 | 64 | 72 | 54 | 76 |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 14 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | SW 19 | SW 18 | SW 18 | SW 18 | WSW 16 | SW 17 | WSW 15 |
| kJ | 72 | 96 | 162 | 199 | 140 | 138 | 136 | 133 | 68 | 67 | 67 | 44 | 42 | 127 | 112 | 155 | 154 | 177 | 140 | 167 |
Swell 3 Height (m) Direction Period (s) | SW 13 | SW 16 | — | W 15 | W 11 | W 13 | W 13 | SW 18 | SW 18 | SW 18 | S 4 | SW 16 | SW 16 | SSW 12 | SSW 12 | SSW 12 | WSW 18 | SSW 14 | WSW 15 | SW 16 |
| kJ | 87 | 66 | — | 4 | 61 | 14 | 14 | 51 | 48 | 49 | 3 | 68 | 41 | 14 | 14 | 14 | 61 | 39 | 78 | 169 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SSW 3 | — | — | — | — | — | WNW 5 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | 26 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 70 | 0 | 0 | 34 | 0 | 0 | 169 | 0 | 0 | 0 | 0 | 0 | 42 | 0 | 0 | 737 | 4 | 4 | 737 | 4 |
Best forecast wave conditions in Washington State | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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