About Swansea Marina
In Swansea Bay tidal streams flow anti-clockwise for 9.5 hours (Swansea HW -3.5 to +6), with at times a race off Mumbles Hd. From HW -6 to -3 the stream reverses, setting North past Mumbles Hd towards Swansea. Keep seaward of Mixon Shoal. When North of SW Inner Green Grounds (SWIGG) SCM It buoy, Q (6) + LFI 15s keep to West of dredged channel and clear of commercial ships. Yachts must motor in harbour and approach, maximum speed 4 knots.

Installations
COORDINATES
51.61635 N, -3.93418 E
Port Information
Weather Forecast
Sun
5AM - 9AM
12 July 2026
- E 6–10 knots. Gusts up to 18 knots.
- Increasing from 16 to 21°C
- SE 0.4m at 3s period
- UV Index: 0 - Low
- Sunny
Sun
9AM - 1PM
12 July 2026
- E 10 knots increasing to 12 knots. Gusts up to 19 knots.
- Increasing from 21 to 28°C
- SE 0.4m at 3s period
- UV Index: 7 - High
- Mostly fine
Sun
1PM - 5PM
12 July 2026
- E 10–13 knots. Gusts up to 19 knots.
- 27 to 33°C
- Calm sea
- UV Index: 7 - High
- Mostly fine