Welsh Weather Words and Phrases for Everyday Conversations

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  • By Welsh Words
Barry Island seafront at golden hour, with the beach, promenade buildings and Ferris wheel overlooking Whitmore Bay.

Talking about the weather is one of the easiest ways to begin a real conversation in Welsh. These Welsh weather words and phrases cover the expressions you are most likely to need when looking out of the window, planning a walk or making everyday small talk.

The basic pattern is reassuringly regular. Welsh commonly treats the weather as hi (“she” or “it”), so many descriptions begin Mae hi’n…. Once you know that frame, you can change the final word to describe sun, cloud, wind, warmth or cold.

Quick answer: ask Sut mae’r tywydd heddiw? (“What is the weather like today?”). A simple reply is Mae hi’n braf (“It is fine”), Mae hi’n heulog (“It is sunny”) or Mae hi’n bwrw glaw (“It is raining”).

How to ask about the weather in Welsh

A useful standard question is:

Sut mae’r tywydd heddiw?
What is the weather like today?

Tywydd means “weather” and heddiw means “today”. You may hear regional alternatives, particularly in everyday speech, but this form is clear and widely useful for learners.

For most descriptions, begin with Mae hi’n, followed by an adjective. In quick conversation you may also hear Mae’n…. Both patterns can occur, but keeping Mae hi’n… as your first learner frame makes the examples easy to remember.

Visitors carrying umbrellas in the rain at the 1958 National Eisteddfod in Ebbw Vale
Visitors in the rain at the 1958 National Eisteddfod in Ebbw Vale: Welsh weather talk has always had practical uses. Photo by Geoff Charles via Wikimedia Commons, CC0.

Essential Welsh weather words and phrases

Welsh English Useful note
Mae hi’n braf. It is fine / pleasant. A very useful general answer.
Mae hi’n heulog. It is sunny. Haul is “sun”; heulog is “sunny”.
Mae hi’n gymylog. It is cloudy. The base form is cymylog.
Mae hi’n wyntog. It is windy. The base form is gwyntog.
Mae hi’n niwlog. It is foggy / misty. Niwl is “fog” or “mist”.
Mae hi’n gynnes. It is warm. The base form is cynnes.
Mae hi’n boeth. It is hot. The base form is poeth.
Mae hi’n oer. It is cold. No visible change after yn.
Mae hi’n sych. It is dry. Useful when rain has stopped.
Mae hi’n bwrw glaw. It is raining. Literally uses the expression bwrw glaw.
Mae hi’n bwrw eira. It is snowing. Eira means “snow”.
Mae hi’n stormus. It is stormy. Storm is “storm”.

To talk about what may happen next, try Mae’n edrych fel glaw (“It looks like rain”) or Dw i’n gobeithio y bydd hi’n sych (“I hope it will be dry”). These are useful complete phrases rather than isolated vocabulary.

Mist lifting from the mountains of Eryri above Llyn Padarn
Mist lifts from the mountains of Eryri (Snowdonia) above Llyn Padarn. Photo by Hefin Owen via Wikimedia Commons, CC BY-SA 2.0.

Why do some weather words change?

After the linking word yn, adjectives can undergo a soft mutation. That is why the dictionary form and the form inside the sentence are sometimes different:

  • cymylog becomes gymylog;
  • gwyntog becomes wyntog;
  • cynnes becomes gynnes;
  • poeth becomes boeth.

Not every first letter changes. Words beginning with vowels, h, n or s remain visibly the same in these examples. Braf is a useful exception to learn as a complete phrase: say Mae hi’n braf, not *Mae hi’n fraf.

TermCymru’s official search guidance notes that its search can find both mutated and unmutated forms. That is helpful when a word you hear does not look exactly like the headword in a dictionary.

A short Welsh weather conversation

A: Sut mae’r tywydd heddiw?
What is the weather like today?

B: Mae hi’n gymylog ac yn wyntog, ond mae hi’n sych.
It is cloudy and windy, but it is dry.

A: Gwych. Beth am fynd am dro?
Great. How about going for a walk?

Notice that the second adjective can follow another yn: yn gymylog ac yn wyntog. Learn the whole rhythm aloud. It is more useful than trying to translate each word separately while you are speaking.

A few pronunciation reminders

  • dd, as in heddiw, sounds like the “th” in “this”.
  • ch, as in sych, is the sound heard in Scottish “loch”, not the “ch” in “chair”.
  • w can work as a vowel in Welsh, including in gwyntog.

Pronunciation varies naturally by region. Aim first for a clear, consistent form and listen to fluent speakers whenever possible.

Rainbow above the Snowdon Horseshoe mountains in Eryri
A rainbow above the Snowdon Horseshoe in Eryri gives several weather words one memorable scene. Photo by Hefin Owen via Wikimedia Commons, CC BY-SA 2.0.

Practise the phrases

Look outside and choose three descriptions: one for the sky, one for the temperature and one for wind or rain. For example: Mae hi’n gymylog. Mae hi’n oer. Mae hi’n wyntog.

Mini quiz: choose the Welsh phrase
  1. How would you say “It is sunny”?
  2. What is the base form behind gymylog?
  3. How would you ask “What is the weather like today?”

Answers: 1. Mae hi’n heulog. 2. Cymylog. 3. Sut mae’r tywydd heddiw?

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