Dinas Emrys

Castle Legendary Welsh hillfort linked to Arthurian myths

A small rocky outcrop in North Wales where legends link a ruined fort to Merlin; walkers visit for short trails, roadside parking and views of nearby lakes and hills.

Main image

Dinas Emrys is an ancient hillfort site in north Wales, noted for its earthworks and strong association with the Welsh legend of Vortigern and the prophetic dragons. The site contains visible stone and earth remains concentrated on a rocky hilltop.

The principal attraction is the association with the story of Merlin (Myrddin) and the red and white dragons said to have been found beneath the hill; visitors examine the summit earthworks, a small pool feature and panoramic views over the surrounding valleys. The footprint is compact so visits are typically short walks combined with local trails.

Archaeological evidence shows the site was used as a defended location in the early medieval period and earlier, with later medieval activity layered above earlier earthworks. The legendary account of Vortigern and the dragons is a medieval narrative linked to the site rather than an archaeological description.

The hill sits within Snowdonia in Gwynedd, north Wales, above local valleys and within walking distance of nearby villages and lanes that serve as access points. It is accessed from local car parks and rural footpaths.

  • Legendary association: Closely associated with the medieval legend of Vortigern and the dragons; interpretive signage is often present at the site.
  • Visiting tip: Small, compact site best visited on foot from nearby lanes and trails; views are best from the summit ridge.

What to See #

  • Dragon's Pool: A small rectangular or rock-cut pool and associated earthworks at the summit area that feature in local legend and remain a visible site feature.
Dinas Emrys
Dinas Emrys, near Beddgelert and Caernarfon, Gwynedd, Wales
53.0220, -4.0790
Free

How to Get to Dinas Emrys #

Dinas Emrys is accessed from small public parking and footpaths near the villages of Beddgelert or Dinas on the A4086/A487 routes in Gwynedd. The hill is a short uphill walk from roadside parking; local buses serve nearby towns but stops are a walk away.

Tips for Visiting Dinas Emrys #

  • Arrive early morning for quieter light and to avoid afternoon cloud that can descend over the hill.
  • Follow the signposted footpaths from the village of Beddgelert/nearby parking rather than picking a scramble - the ground hides potholes and sheep paths.
  • Read the Mabinogion excerpt before visiting: the site's charm multiplies when the story of Vortigern and the buried dragons is in mind.

Best Time to Visit Dinas Emrys #

Best visited late spring through early autumn for walking conditions and clearer skies; winter can bring boggy ground and fast-changing weather.

Summer
June-August · 10-18°C (50-64°F)
Warmest weather and longest daylight for hillwalking; still susceptible to sudden cloud.
Spring / Autumn
April-May & September-October · 6-14°C (43-57°F)
Fewer visitors and good colours; mornings can be clear with crisp light for photography.

Weather & Climate near Dinas Emrys #

Climate

Dinas Emrys's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in July) and cold winters (coldest in January). Temperatures range from 2°C to 19°C. Abundant rainfall (1123 mm/year), wettest in November.

Air Quality: AQI 25 Good
Best Time to Visit
JulyJuneAugust
Temperature & Rainfall
Temperature Range
26°
Warmest Month
-4°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 7°C and lows of 2°C. Significant rainfall (107 mm) and mostly overcast skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
87%
Humidity
Very Humid

Weather

107 mm
Rainfall
5.6 m/s
Wind
Light Breeze
0.0
UV Index
Low
7.9h daylight

February

February is cold with highs of 7°C and lows of 2°C. Moderate rainfall (79 mm) and mostly overcast skies.

44 Poor

Comfort

Feels Like Cold
C
Temperature
87%
Humidity
Very Humid

Weather

79 mm
Rainfall
5.4 m/s
Wind
Light Breeze
0.1
UV Index
Low
9.6h daylight

March

March is cold with highs of 9°C and lows of 3°C. Regular rainfall (98 mm) and mostly overcast skies.

52 Acceptable

Comfort

Feels Like Cold
C
Temperature
86%
Humidity
Very Humid

Weather

98 mm
Rainfall
5.1 m/s
Wind
Light Breeze
0.4
UV Index
Low
11.7h daylight

April

April is cold with highs of 12°C and lows of 4°C. Moderate rainfall (70 mm) and mostly overcast skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
12°
84%
Humidity
Very Humid

Weather

70 mm
Rainfall
4.4 m/s
Wind
Light Breeze
0.8
UV Index
Moderate
13.8h daylight

May

May is cool with highs of 15°C and lows of 7°C. Moderate rainfall (65 mm) and mostly overcast skies.

56 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
15°
83%
Humidity
Very Humid

Weather

65 mm
Rainfall
4.5 m/s
Wind
Light Breeze
1.2
UV Index
High
15.7h daylight

June

June is cool with highs of 17°C and lows of 9°C. Moderate rainfall (71 mm) and mostly overcast skies.

64 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
17°
84%
Humidity
Very Humid

Weather

71 mm
Rainfall
4.1 m/s
Wind
Light Breeze
1.4
UV Index
High
16.7h daylight

July

July is cool with highs of 19°C and lows of 12°C. Moderate rainfall (74 mm) and mostly overcast skies.

66 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 19°
85%
Humidity
Very Humid

Weather

74 mm
Rainfall
4.1 m/s
Wind
Light Breeze
1.3
UV Index
High
16.2h daylight

August

August is cool with highs of 19°C and lows of 12°C. Regular rainfall (90 mm) and mostly overcast skies.

64 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 19°
85%
Humidity
Very Humid

Weather

90 mm
Rainfall
3.9 m/s
Wind
Light Breeze
1.0
UV Index
High
14.6h daylight

September

September is cool with highs of 17°C and lows of 10°C. Regular rainfall (99 mm) and mostly overcast skies.

62 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
10° 17°
85%
Humidity
Very Humid

Weather

99 mm
Rainfall
4.2 m/s
Wind
Light Breeze
0.6
UV Index
Moderate
12.5h daylight

October

October is cool with highs of 14°C and lows of 8°C. Significant rainfall (121 mm) and mostly overcast skies.

52 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
14°
85%
Humidity
Very Humid

Weather

121 mm
Rainfall
5.0 m/s
Wind
Light Breeze
0.3
UV Index
Low
10.4h daylight

November

November is cold with highs of 10°C and lows of 5°C. The wettest month with heavy rain (130 mm) and mostly overcast skies.

46 Poor

Comfort

Feels Like Cold
C
Temperature
10°
86%
Humidity
Very Humid

Weather

130 mm
Rainfall
4.8 m/s
Wind
Light Breeze
0.1
UV Index
Low
8.4h daylight

December

December is cold with highs of 8°C and lows of 3°C. Significant rainfall (119 mm) and mostly overcast skies.

40 Poor

Comfort

Feels Like Cold
C
Temperature
87%
Humidity
Very Humid

Weather

119 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.0
UV Index
Low
7.3h daylight

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