Greenwich wave buoy daily averages for Dec 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
4 ft
0.7 — 8.9 ft
Average Wave period
7 secs
5 — 11 secs
Average Water temperature
12 °C
10.1 — 12.9 °C
Average Wind
S, 25 mph
2 — 49 mph
Chart showing grouped wave observations for Greenwich. Use the table on this page for a text version of the same measurements.
About Greenwich wave buoy
Greenwich (WMO 62305) is an offshore station in the southern North Sea/Thames approaches (50.4170°N, 0.0000°E). It is sited to monitor waves and weather affecting busy shipping lanes and coastal flood/sea-state forecasting for south‑east England. It reports wave height/period/direction and meteorological variables such as wind and pressure.
| Day | Wave height (ft) | Wave Period (s) | Wind Direction | Wind Speed (mph) | Water Temp (°C) |
|---|---|---|---|---|---|
| 6 | 6 | SSW | 37 | 12.7 | |
| 5 | 7 | SSW | 22 | 12.8 | |
| 3 | 7 | SSW | 20 | 12.7 | |
| 4 | 6 | SSW | 25 | 12.5 | |
| 4 | 7 | SSW | 25 | 12.3 | |
| 8 | 7 | SW | 33 | 12.6 | |
| 6 | 7 | SW | 28 | 12.8 | |
| 4 | 7 | SSW | 23 | 12.9 | |
| 5 | 7 | S | 30 | 12.8 | |
| 5 | 7 | SW | 24 | 12.8 | |
| 3 | 7 | S | 21 | 12.6 | |
| 4 | 8 | SW | 20 | 12.7 | |
| 3 | 10 | W | 8 | 12.6 | |
| 3 | 7 | SSW | 23 | 12.5 | |
| 5 | 7 | S | 28 | 12.4 | |
| 3 | 7 | SSW | 19 | 12.5 | |
| 3 | 7 | SW | 21 | 12.2 | |
| 8 | 7 | S | 35 | 12.3 | |
| 4 | 7 | WSW | 20 | 12.3 | |
| 3 | 7 | SSE | 16 | 12.1 | |
| 3 | 7 | ESE | 22 | 12.2 | |
| 2 | 7 | SE | 16 | 12.2 | |
| 3 | 6 | ENE | 27 | 11.9 | |
| 7 | 7 | NE | 40 | 11.5 | |
| 5 | 7 | ENE | 31 | 10.8 | |
| 2 | 6 | ENE | 24 | 10.8 | |
| 5 | 6 | ENE | 33 | 11.0 | |
| 3 | 6 | ENE | 27 | 11.0 | |
| 2 | 5 | NE | 24 | 10.7 | |
| 2 | 5 | NE | 24 | 10.6 | |
| 1 | 7 | NNW | 15 | 10.3 |