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Bruny Island - Mabel Bay Surf Forecast
/ TAS – East Coast (46 breaks) / Tasmania (59 breaks) /
Surf Forecasts:
Bruny Island - Mabel Bay surfForecast / TAS – East Coast / Australia
12 Day Weather and Surf, issued 9 am Thursday 18 Sep 2025 AEST
Best Forecast Surf Conditions for Bruny Island - Mabel Bay this week:
The surf forecast for Bruny Island - Mabel Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 1PM. The primary swell is predicted to be 1.4m and 10s period with a secondary swell of 0.9m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Bruny Island - Mabel Bay in the next 12 days are 5.5m 14s and forecast to arrive on Saturday (Sep 20) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 4s period and expected on Saturday (Sep 20) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Thu 18th Sep) | 4.5ft (1.4m) 10s |
| Best Surf | 4PM (Sat 20th Sep) | 15ft (4.5m) 13s |
| Most Powerful | 10AM (Sat 20th Sep) | 18ft (5.5m) 14s |
Table - best surf conditions forecast for Bruny Island - Mabel Bay over the next 12 days.
Short Range Forecast Moderate rain (total 10mm), heaviest on Fri night. Very mild (max 14°C on Thu afternoon, min 6°C on Fri night). Winds increasing (light winds from the N on Thu night, gales from the W by Fri night). | Days 3-6 Weather Summary Moderate rain (total 10mm), heaviest on Mon morning. Very mild (max 14°C on Sun morning, min 7°C on Sun night). Mainly strong winds. | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 12 | 14 | 15 | 14 | 14 | 13 | 12 | 12 | 12 | 13 | 14 | 14 | 13 | 13 | 13 | 11 | 11 | 12 | 13 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 530 | 301 | 384 | 518 | 373 | 1527 | 12442 | 6989 | 4045 | 6564 | 7194 | 5858 | 5064 | 5404 | 3584 | 4751 | 5429 | 2189 | 2964 | 4261 | 4243 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | off | cross- off | cross- off | cross- off | cross | cross- off | off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 3:04PM 0.70 | 7:13AM 0.46 | 3:39PM 0.66 | 7:03AM 0.44 | 4:13PM 0.61 | 6:48AM 0.44 | 4:49PM 0.55 | 6:33AM 0.46 | 5:33PM 0.49 | 6:19AM 0.48 | 7:11PM 0.42 | 6:04AM 0.52 | |||||||||
Low Tide / height (m) | 11:15PM 0.14 | 8:31AM 0.46 | 11:42PM 0.20 | 9:21AM 0.43 | 12:02AM 0.26 | 10:20AM 0.42 | 12:10AM 0.32 | 11:34AM 0.40 | 11:56PM 0.38 | 1:17PM 0.38 | 10:20PM 0.41 | 3:58PM 0.34 | |||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 6:09 | - | - | 6:07 | - | - | 6:05 | - | - | 6:03 | - | - | 6:01 | - | - | 6:00 | - | - | 5:58 | - | - |
| Sunset | - | 6:01 | - | - | 6:02 | - | - | 6:04 | - | - | 6:05 | - | - | 6:07 | - | - | 6:07 | - | - | 6:08 | - |
 |  |  | | | |  | | | | | | | | | | |  | |  | | |
Rain (mm) | - | - | 2 | - | - | 4 | 2 | - | 2 | - | 1 | 2 | 4 | 2 | 1 | - | - | - | - | 2 | 2 |
| Temp. °C | 13 | 14 | 12 | 12 | 13 | 10 | 9 | 9 | 10 | 14 | 11 | 8 | 8 | 9 | 8 | 13 | 12 | 11 | 11 | 8 | 8 |
| Feels °C (?) | 9 | 11 | 6 | 8 | 9 | 1 | -3 | -1 | 3 | 9 | 3 | -3 | -1 | 0 | 1 | 7 | 6 | 4 | 0 | -5 | -5 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for TAS - East Coast
Calm condsitions have become offshore at Shipstern Bluff (light winds from the N at Dennes Point 33 km from Shipstern Bluff). 1.3m 10s swell from the SSW with a 1.0m 13s groundswell from the SW. 2 swells combining to make bigger set waves.
1 h 30 min ago
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Information about the Bruny Island - Mabel Bay Surf forecast
The above surf forecast table for Bruny Island - Mabel Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Bruny Island - Mabel Bay can be found by selecting the local surf guide option on the grey menu. Our Bruny Island - Mabel Bay 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 (Bruny Island - Mabel Bay) 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 Bruny Island - Mabel Bay 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 holiday in East Coast of Tasmania? If you are looking for accommodation near Bruny Island - Mabel Bay, camping, hotels and holiday cottages in East Coast of Tasmania, consider staying in Hobart which is 66 km (41 miles) away. Alternatively, find information about places to stay and car hire in Port Arthur which is 67 km (42 miles) away
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