Surf Forecasts:
Devonport Rivermouth surf forecast from 14 Aug 2026:
- Best quality surf: Friday 21 Aug, 1AM (local time) - 5ft (1.5m), 7s period, NW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 10PM (local time) - 6.5ft (2.0m), 8s period, WNW swell with 459 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 10PM (local time) - 5ft (1.5m), 6s period with NW swell.
Best Forecast Surf Conditions for Devonport Rivermouth this week:
The surf forecast for Devonport Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 10PM. The primary swell is predicted to be 1.5m and 6s period with a secondary swell of 0.3m and 5s. Another secondary swell of 0.3m and 13s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Devonport Rivermouth in the next 16 days are 2.0m 8s and forecast to arrive on Friday (Aug 21) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 18) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 20th Aug) | 5ft (1.5m) 6s |
| Best Surf | 1AM (Fri 21st Aug) | 5ft (1.5m) 7s |
| Most Powerful | 10PM (Fri 21st Aug) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.
The Lowdown
Alright, mates, Rusty here. We're looking at a proper flat spell stretching out over the next couple of weeks, so don't get too worked up just yet. It's gonna be a grind, and you'll need to be picky.
For the first ten days or so, it's all small fry. We're talking knee-high dribble around 1ft, with periods that are all over the place. You'll get some clean windows—like Sunday the 16th or Thursday the 20th, with glassy conditions—but there's zero power. The energy readings are weak, mostly in the 20s, 30s, or 40s, showing there's nothing moving. Friday the 21st sees a bump to about 4ft, but the period drops to a junky 6 seconds, so it'll be soft and gutless. With the wind mostly cross or onshore, it's not going to be worth the paddle.
The only real day that stands out is Sunday the 23rd. It's small in the morning at around 4ft, but the afternoon is a different story. The swell pushes up to over 6ft, out of the NW, with a 6-second period. The combined swell energy jumps to a strong 307, which is by far the most we see in this whole stretch. That's a serious amount of water moving, but that short period means it's going to be raw, pitchy, and powerful. The wind is a clean cross-off from the W at around 12 mph, so the faces should be reasonably clean, but this is not for beginners. At this size and with that short interval, it's strictly for the experienced crew. Devonport Rivermouth (North West) is the spot, and it's a break that's usually inconsistent, so to see it light up like this is something special. It'll be a proper handful.
After that, the switch gets switched off again. The tail end of the window into the 29th is flat and uninspiring; nothing over 3ft, and what's there is short-period windswell. It stays clean, but it's just dead.
There might be a day you can get out on a foamie if you're desperate, but honestly, this is a bleak forecast. Water temps are about normal for this time of year. So, circle Sunday afternoon, the 23rd. That's your one shot. The rest? Not worth the wetsuit. Stay tuned, we'll see what happens.
Rusty.
Short Range ForecastMostly dry. Very mild (max 13°C on Sun morning, min 9°C on Sat morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Wed night. Very mild (max 14°C on Tue morning, min 9°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | |||||||||||||||
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) | NW 16 | NW 16 | NW 15 | NW 14 | NW 14 | NW 14 | NW 14 | NW 16 | NW 16 | NE 6 | NE 6 | NE 6 | NE 7 | NE 6 | NW 6 | NW 5 | NNW 6 | NW 7 | NW 5 | WNW 7 | WNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 63 | 61 | 34 | 33 | 33 | 33 | 33 | 43 | 38 | 50 | 83 | 69 | 77 | 42 | 38 | 30 | 68 | 198 | 55 | 372 | 319 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-off | cross-off | glassy | cross-off | cross | on | cross | cross | cross-on | cross-on | on | on | cross-on | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 1:38PM3.16m | 1:56AM3.13m | 2:30PM3.18m | 2:53AM3.14m | 3:18PM3.20m | 3:46AM3.13m | 4:01PM3.21m | 4:34AM3.12m | 4:41PM3.20m | 5:17AM3.08m | 5:18PM3.18m | 5:58AM3.04m | 5:52PM3.15m | ||||||||
Low Tide | 7:53PM0.87m | 8:17AM0.68m | 8:47PM0.77m | 9:09AM0.74m | 9:37PM0.69m | 9:55AM0.82m | 10:21PM0.65m | 10:37AM0.91m | 11:02PM0.64m | 11:15AM1.01m | 11:40PM0.67m | 11:51AM1.11m | 00:16AM0.71m | ||||||||
 |  |  | | |  | | | | |  |  |  |  |  | | | | | | | |
 | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — |
 | — | 5:31 | — | — | 5:32 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 1 | 7 | 10 | — | — | — | 1 | — | 2 |
Temp °C | 11 | 12 | 10 | 13 | 12 | 11 | 13 | 12 | 11 | 14 | 14 | 12 | 13 | 12 | 13 | 14 | 13 | 11 | 12 | 13 | 11 |
Feels °C | 9 | 10 | 7 | 11 | 10 | 9 | 11 | 10 | 8 | 10 | 11 | 9 | 10 | 10 | 9 | 9 | 8 | 8 | 9 | 8 | 6 |
Swell 1 Height (m) Direction Period (s) | NW 16 | NW 16 | NW 15 | NW 14 | NE 5 | NNE 4 | NNE 4 | NW 16 | NNE 4 | NW 15 | NNW 14 | NW 14 | NE 7 | NE 6 | NW 6 | NE 5 | NE 5 | NNW 7 | NW 16 | NNW 15 | NW 13 |
| kJ | 63 | 61 | 34 | 33 | 6 | 2 | 1 | 43 | 8 | 33 | 20 | 7 | 77 | 42 | 38 | 10 | 3 | 116 | 40 | 21 | 78 |
Swell 2 Height (m) Direction Period (s) | NW 4 | — | — | — | NW 14 | NW 14 | NW 14 | N 6 | NW 16 | NW 15 | — | — | NW 14 | NW 15 | NE 5 | NW 13 | NE 6 | NNE 5 | NE 6 | NW 18 | — |
| kJ | 1 | — | — | — | 33 | 33 | 33 | 1 | 38 | 33 | — | — | 7 | 9 | 11 | 7 | 6 | 2 | 2 | 13 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 5 | NW 14 | NE 6 | NW 13 | NW 13 | NE 5 | NE 7 | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 8 | 2 | 7 | 27 | 1 | 2 | — |
Wind waves Height (m) Direction Period (s) | — | E 3 | SE 2 | SSE 2 | — | — | — | NNE 4 | ESE 2 | NE 6 | NE 6 | NE 6 | — | — | NNE 4 | NW 5 | NNW 6 | NW 7 | NW 5 | WNW 7 | WNW 7 |
| kJ | — | 1 | 1 | 1 | — | — | — | 1 | 1 | 50 | 83 | 69 | — | — | 8 | 30 | 68 | 198 | 55 | 372 | 319 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 131 | 148 | 131 | 131 | 143 | 131 | 131 | 131 | 131 | 216 | 233 | 143 | 216 | 216 | 259 | 220 | 184 | 0 | 216 | 227 | 184 |
Best forecast wave conditions in North Coast of Tasmania | |||||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||||
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Information about the Devonport Rivermouth Surf forecast
The above surf forecast table for Devonport Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Devonport Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Devonport Rivermouth 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 (Devonport Rivermouth) 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 Devonport Rivermouth 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.
Devonport Rivermouth is 5 km (3 miles) from Devonport. If you plan a holiday in North Coast of Tasmania, look for hotels and other accommodation in Devonport. Devonport has rooms for a wide range of budgets as well as car hire and transport links.
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