The Observatory is a Grade II* listed building in the Pembrokeshire local planning authority area, Wales. First listed on 3 June 1964. Observatory.
The Observatory
- WRENN ID
- noble-zinc-autumn
- Grade
- II*
- Local Planning Authority
- Pembrokeshire
- Constituency
- Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
- Country
- Wales
- Date first listed
- 3 June 1964
- Type
- Observatory
- Address
- The Observatory, Hakin, Milford Haven
- OS grid reference
- SM 892 059
- Coordinates
- 51.71264, -5.05265
- Source
- Cadw listing
Description
The Observatory is a 19th-century octagonal structure built from rubble stone. The upper part features a vaulted design with slits for telescope openings, although two segments of the vault have collapsed inward, leaving a top opening of approximately 8 feet in diameter. The inner vaulting is made of brick. The original ground floor includes an arched entryway with a cut stone arch and a circular interior that still shows remnants of the ceiling vaulting.
There are low single-storey outbuildings to the west, east, and north, also constructed from rubble stone. The building to the left has one door with plain stone voussoirs above it, while the one to the right features a short recessed section with an arched doorway and a blank arched panel in the main part. The rear of this section includes one arched window and a corresponding door in the recess. The northern rear wing has been altered.
Local climate
The Observatory sits in a wetter-than-average part of the UK, with an average of 1,120 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 98% of listed buildings.
It experiences an average of 1 freeze-thaw cycle a year, fewer than 99% of listed buildings. Average temperatures at this location have risen by 0.3°C per decade since 1991.
Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.
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- Detailed attributes — period, style, materials, features
- Flood risk assessment
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- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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