Weithiau mae’n rhaid cau ysgolion am resymau fel gweithredu diwydiannol neu ddiwrnodau HMS. Caiff y dudalen hon ei diweddaru’n uniongyrchol gan ysgolion i roi gwybod ymlaen llaw am unrhyw ysgolion a gaiff eu cau.
I gael gwybodaeth am ysgolion a gaiff eu cau yn ddirybudd, er enghraifft pan fo tywydd difrifol, gweler y dudalen cau ysgolion.
| Ysgol | Dyddiad | Gwybodaeth Ychwanegol |
|---|---|---|
| Ysgol Fabanod Bryntirion | 19/12/2025 | Inset Day |
| Ysgol Gynradd Pen-y-bont | 19/12/2025 | INSET Day 3 |
| Ysgol Gynradd Pencoed | 19/12/2025 | INSET Day |
| Ysgol Gynradd Mynydd Cynffig | 05/01/2026 | INSET day 4 |
| Ysgol Gynradd yr Eglwys yng Nghymru yr Archddiacon John Lewis | 05/01/2026 | INSET Day 3 of 6 |
| Ysgol Fabanod Bryntirion | 05/01/2026 | Inset Day |
| Ysgol Gynradd Maes yr Haul | 05/01/2026 | INSET Day |
| Ysgol Gynradd Corneli | 05/01/2026 | INSET |
| Ysgol Gynradd Abercerdin | 05/01/2026 | INSET Day |
| Ysgol Gynradd Blaengarw | 05/01/2026 | Inset Day |
| Ysgol Gynradd Betws | 05/01/2026 | Inset Day |
| Ysgol Gynradd Corneli | 06/01/2026 | INSET |
| Ysgol Gynradd Abercerdin | 06/01/2026 | INSET Day |
| Ysgol Gynradd Abercerdin | 09/02/2026 | INSET Day |
| Ysgol Gynradd yr Eglwys yng Nghymru yr Archddiacon John Lewis | 23/02/2026 | INSET Day 4 of 6 |
| Ysgol Uwchradd Gatholig Archesgob McGrath | 23/02/2026 | Inset Day |
| Ysgol Gynradd Pen-y-bont | 23/02/2026 | INSET Day 4 |
| Ysgol Gynradd Croesty | 16/03/2026 | INSET Day 4 - School closed to pupils |
| Ysgol Gyfun Porthcawl | 23/03/2026 | INSET Day 4 |
| Ysgol Uwchradd Gatholig Archesgob McGrath | 23/03/2026 | Inset Day |
| Ysgol Gynradd Coety | 27/03/2026 | Closed - Inset Day - School Closed |
| Ysgol Gynradd Llangynwyd | 27/03/2026 | INSET DAY |
| Ysgol Gynradd Blaengarw | 27/03/2026 | Inset Day |
| Ysgol Gynradd Betws | 27/03/2026 | Inset Day |
| Ysgol Gynradd yr Eglwys yng Nghymru yr Archddiacon John Lewis | 04/05/2026 | Bank Holiday |
| Ysgol Gynradd Maes yr Haul | 07/05/2026 | INSET Day (polling day) |
| Ysgol Gynradd Maes yr Haul | 08/05/2026 | INSET day |
| Ysgol Gynradd Mynydd Cynffig | 22/05/2026 | INSET Day 5 |
| Ysgol Gynradd yr Eglwys yng Nghymru yr Archddiacon John Lewis | 22/05/2026 | INSET Day 5 of 6 |
| Ysgol Gynradd Coety | 22/05/2026 | Closed - Inset Day - School Closed |
| Ysgol Gynradd Pen-y-bont | 22/05/2026 | INSET Day 5 |
| Ysgol Gynradd Blaengarw | 22/05/2026 | Inset Day |
| Ysgol Gynradd Betws | 22/05/2026 | Inset day |
| Ysgol Gynradd Croesty | 19/06/2026 | INSET Day 5 - School closed to pupils |
| Ysgol Gyfun Porthcawl | 22/06/2026 | INSET Day 5 |
| Ysgol Uwchradd Gatholig Archesgob McGrath | 29/06/2026 | Inset Day |
| Ysgol Gynradd Llangynwyd | 17/07/2026 | INSET DAY |
| Ysgol Gynradd Maes yr Haul | 20/07/2026 | INSET Day |
| Ysgol Gynradd Croesty | 20/07/2026 | INSET Day 6 - School closed to pupils |
| Ysgol Gynradd Mynydd Cynffig | 20/07/2026 | INSET day 6 |
| Ysgol Gynradd yr Eglwys yng Nghymru yr Archddiacon John Lewis | 20/07/2026 | INSET Day 6 of 6 |
| Ysgol Gynradd Coety | 20/07/2026 | Closed - Inset Day - School Closed |
| Ysgol Gyfun Porthcawl | 20/07/2026 | INSET Day 6 |
| Ysgol Fabanod Bryntirion | 20/07/2026 | Inset Day |
| Ysgol Gynradd Llangynwyd | 20/07/2026 | INSET DAY |
| Ysgol Gynradd Corneli | 20/07/2026 | INSET |
| Ysgol Gynradd Abercerdin | 20/07/2026 | INSET Day. Open for Food and Fun scheme participants. |
| Ysgol Uwchradd Gatholig Archesgob McGrath | 20/07/2026 | Inset Day |
| Ysgol Gynradd Pen-y-bont | 20/07/2026 | INSET Day 6 |
| Ysgol Gynradd Pencoed | 20/07/2026 | |
| Ysgol Gynradd Blaengarw | 20/07/2026 | Inset Day |
| Ysgol Gynradd Betws | 20/07/2026 | Inset Day |
| Ysgol Gynradd Maes yr Haul | 01/09/2026 | INSET Day |
| Ysgol Gynradd Coety | 02/10/2026 | INSET Day - school closed to pupils |
| Ysgol Gynradd Maes yr Haul | 06/05/2027 | INSET Day (polling day) |
