Greenwich wave
buoy daily averages for Sep 2025 last observation shown
oldest observation available
Monthly averages for 
Average Wave Height
4 ft
1 — 9.2 ft
Average Wave period
7 secs
5 — 9 secs
Average Water temperature
18 °C
17.3 — 18.5 °C
Average Wind
SW, 23 mph
3 — 40 mph
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 5.5 | 6.5 | WSW | 27 | 17.5 | |
| 5.9 | 6.6 | WSW | 29 | 17.6 | |
| 6.2 | 6.6 | WSW | 30 | 17.7 | |
| 3.4 | 6 | SSW | 25 | 17.8 | |
| 1.3 | 7.1 | S | 11 | 18.0 | |
| 2.1 | 6.7 | WSW | 15 | 18.0 | |
| 1.8 | 5.9 | SSE | 18 | 18.1 | |
| 1.4 | 6.6 | ESE | 16 | 18.1 | |
| 2.8 | 7.4 | WSW | 13 | 18.0 | |
| 6.0 | 7 | SW | 28 | 17.9 | |
| 7.0 | 7 | SSW | 33 | 18.0 | |
| 3.9 | 6.3 | SSW | 24 | 18.0 | |
| 4.1 | 7 | SW | 24 | 18.1 |
Realtime data displayed on this page is from the Met
Office
Marine observations.