Greenwich wave buoy daily averages for May 2025 last observation shown Data available: to Monthly averages for
Average Wave Height
1 ft
0.7 — 3.3 ft
Average Wave period
8 secs
5 — 26 secs
Average Water temperature
12 °C
10.7 — 13.7 °C
Average Wind
NE, 16 mph
1 — 32 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) |
|---|---|---|---|---|---|
| 1 | 18 | ENE | 11 | 11.4 | |
| 1 | 13 | W | 11 | 11.3 | |
| 1 | 9 | NE | 14 | 11.4 | |
| 2 | 6 | NE | 20 | 11.2 | |
| 2 | 6 | NNE | 25 | 11.0 | |
| 2 | 6 | NE | 22 | 11.0 | |
| 2 | 6 | NE | 20 | 11.1 | |
| 2 | 6 | NE | 21 | 11.2 | |
| 2 | 6 | NE | 20 | 11.3 | |
| 1 | 8 | ENE | 18 | 11.5 | |
| 1 | 10 | ENE | 13 | 11.7 | |
| 1 | 15 | ESE | 11 | 11.7 | |
| 1 | 18 | ENE | 8 | 12.1 | |
| 1 | 7 | NE | 17 | 11.9 | |
| 1 | 6 | NNE | 16 | 11.6 | |
| 1 | 6 | NNE | 11 | 12.1 | |
| 1 | 7 | NNE | 13 | 12.0 | |
| 1 | 10 | ENE | 11 | 12.2 | |
| 1 | 6 | NE | 20 | 12.1 | |
| 1 | 8 | NE | 10 | 12.6 | |
| 1 | 9 | NNW | 9 | 12.4 | |
| 1 | 9 | ENE | 8 | 12.5 | |
| 1 | 8 | S | 10 | 12.4 | |
| 2 | 6 | WSW | 24 | 12.2 | |
| 3 | 6 | SW | 27 | 12.4 | |
| 3 | 6 | WSW | 22 | 12.4 | |
| - | - | - | - | - | |
| 3 | 6 | WSW | 22 | 12.8 | |
| 2 | 6 | SW | 21 | 12.7 | |
| 1 | 8 | SW | 10 | 13.0 | |
| 1 | 8 | WSW | 12 | 13.1 |