Surf Forecasts:
Devonport Rivermouth surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 7PM (local time) - 3.5ft (1.0m), 6s period, NW swell with cross-offshore winds.
- Most powerful swell: Wednesday 19 Aug, 7PM (local time) - 7ft (2.1m), 6s period, N swell with 367 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 7PM (local time) - 3.5ft (1.0m), 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 7PM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.3m and 7s. Another secondary swell of 0.2m and 10s 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 2.1m 6s and forecast to arrive on Wednesday (Aug 19) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Wednesday (Aug 19) at 7AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Thu 20th Aug) | 3.5ft (1.0m) 6s |
| Best Surf | 7PM (Thu 20th Aug) | 3.5ft (1.0m) 6s |
| Most Powerful | 7PM (Wed 19th Aug) | 7ft (2.1m) 6s |
Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.
The Lowdown
Alright, Rusty here. Let's talk about what's coming up for the local scene.
To be straight with you, we are looking at a pretty bleak stretch ahead. For the next week and a half, the surf is just not playing ball. The first real chance of anything remotely rideable doesn’t show up until Wednesday the 26th of August, and even then it’s a one-star day. The setup at Devonport Rivermouth is a point/river break, and it’s usually inconsistent, so a run of flat, messy days isn’t a huge surprise, but it’s still a bummer.
There’s no real standout in this forecast. The only day that gets a nod at all is Wednesday afternoon on the 26th. We’ll see a tiny pulse of swell from the N at about 4ft, but with a short period of just 5 seconds, it won't have much punch. The wind goes glassy, which is a massive positive for clean conditions. The combined swell energy is weak, reading only 84. Water temp is about average for this time of year at 55°, nothing unusual there. But honestly, for a break that’s already inconsistent, a tiny, weak, short-period swell isn't going to offer much.
After that, we get another small bump on Friday the 28th of August in the morning. Swell from the NNW at 4ft with a 7-second period, light offshore W wind, and clean conditions. The energy reads 192, so it’s got a bit more push than the Wednesday slop. But again, for an inconsistent spot like this, it’s a gamble. It’s surfable, but nothing to get excited about.
The rest of the run? Mostly flat, onshore, or blown out. We’ve got a big gap from the 29th of August right through to the end of the forecast on the 2nd of September with nothing worth paddling out for. Swells drop to 0.3ft, winds get fresh, and it’s just not happening.
So, if you’re desperate, maybe sneak a look at that Wednesday afternoon glass-off on the 26th, or the Friday morning clean-up on the 28th. But keep expectations low. This is one of those quiet periods where the forecast can change, but for now, the board stays in the car.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Wed afternoon. Very mild (max 14°C on Tue morning, min 9°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 14°C on Sat morning, min 11°C on Fri afternoon). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 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) | NE 6 | NE 6 | NE 5 | NE 5 | NNE 5 | NNW 7 | NW 6 | NW 6 | NW 5 | NW 6 | NW 6 | NW 17 | WNW 6 | NW 6 | NW 15 | NW 6 | NW 5 | NW 5 | NW 6 | NW 6 | NW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 44 | 73 | 47 | 37 | 75 | 257 | 144 | 99 | 41 | 83 | 118 | 75 | 99 | 86 | 57 | 72 | 66 | 63 | 190 | 255 | 69 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | on | cross | cross | cross | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | glassy |
High Tide | 4:01PM3.21m | 4:34AM3.12m | 4:41PM3.20m | 5:17AM3.08m | 5:18PM3.18m | 5:58AM3.04m | 5:52PM3.15m | 6:36AM2.99m | 6:27PM3.10m | 7:14AM2.94m | 7:02PM3.04m | 7:53AM2.90m | 7:40PM2.97m | ||||||||
Low Tide | 10:21PM0.65m | 10:37AM0.91m | 11:02PM0.64m | 11:15AM1.01m | 11:40PM0.67m | 11:51AM1.11m | 00:16AM0.71m | 12:26PM1.19m | 00:51AM0.76m | 1:01PM1.27m | 1:27AM0.81m | 1:38PM1.33m | 2:05AM0.86m | ||||||||
 |  |  |  |  |  | | |  | | | | | | | | | |  | |  | |
 | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — | 6:52 | — | — |
 | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — | — | 5:40 | — |
mm | — | — | — | 5 | 15 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 14 | 14 | 12 | 12 | 13 | 13 | 13 | 13 | 11 | 13 | 13 | 12 | 14 | 14 | 11 | 13 | 13 | 12 | 13 | 13 | 11 |
Feels °C | 11 | 11 | 10 | 10 | 8 | 9 | 9 | 9 | 7 | 8 | 8 | 7 | 9 | 9 | 7 | 8 | 8 | 9 | 10 | 9 | 9 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NNW 14 | NE 5 | NW 14 | NW 15 | NE 6 | NE 7 | NE 7 | NW 5 | WNW 11 | NW 15 | NW 17 | NW 16 | NW 16 | NW 15 | NW 15 | NW 15 | NW 16 | — | — | NW 11 |
| kJ | 44 | 20 | 47 | 7 | 9 | 39 | 19 | 14 | 41 | 12 | 34 | 75 | 63 | 86 | 57 | 33 | 36 | 38 | — | — | 4 |
Swell 2 Height (m) Direction Period (s) | NW 15 | — | NW 14 | — | — | NW 15 | NW 13 | NW 13 | NW 12 | NW 16 | NW 19 | NE 7 | — | — | — | — | — | — | — | — | NW 13 |
| kJ | 33 | — | 7 | — | — | 8 | 7 | 7 | 22 | 10 | 14 | 2 | — | — | — | — | — | — | — | — | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 19 | NW 18 | NNE 7 | NE 7 | NE 7 | — | — | — | — | — | — | — | — | — | N 19 |
| kJ | — | — | — | — | — | — | 14 | 12 | 5 | 2 | 2 | — | — | — | — | — | — | — | — | — | 7 |
Wind waves Height (m) Direction Period (s) | — | NE 6 | SE 3 | NE 5 | NNE 5 | NNW 7 | NW 6 | NW 6 | — | NW 6 | NW 6 | WNW 6 | WNW 6 | NW 6 | WNW 5 | NW 6 | NW 5 | NW 5 | NW 6 | NW 6 | NW 6 |
| kJ | — | 73 | 1 | 37 | 75 | 257 | 144 | 99 | — | 83 | 118 | 59 | 99 | 72 | 49 | 72 | 66 | 63 | 190 | 255 | 69 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 216 | 143 | 143 | 216 | 216 | 184 | 227 | 184 | 216 | 216 | 216 | 184 | 184 | 184 | 184 | 184 | 211 | 184 | 227 | 211 | 0 |
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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