Montpellier Hérault RC are slight favorites to beat Castres Olympique with typical match odds around 1.85 for Montpellier and 2.00–2.20 for Castres on the moneyline; Montpellier’s edge comes from a recent run of four wins in their last five Top 14 matches, stronger attacking metrics (averaging 26.4 points over the last 6 games) and home form at GGL Stadium, while Castres have struggled away, losing three of their last four away fixtures.

The kick-off is on 20 December 2025 at 15:35 local time (CET), which equals 14:35 UTC; fans should allow extra time for pre-match build-up and stadium access.

The game will be played at GGL Stadium (also known as Altrad Stadium) in Montpellier, France, a 15,697-capacity venue with modern synthetic pitch upgrades installed this season and strong crowd support for Montpellier, where weather in mid-December typically brings cool, dry conditions favoring handling rugby.

Our prediction: Montpellier Hérault RC to win with a -3.5 handicap recommended based on form and home advantage, implied moneyline odds ~1.85 and a projected total points line around 50.5; Montpellier’s recent attack efficiency and Castres’ lower scrum dominance away justify backing Montpellier and considering the DexWin - Best Odds on Your Favourite Sports price boosts when available.

In head-to-heads over the last 10 Top 14 meetings, Montpellier lead with 6 wins to Castres’ 3 wins and 1 draw; average total points in those encounters is 48.2, Montpellier average 27.1 points per game while Castres average 21.1, and Montpellier have won the last two meetings including a 28-18 away victory earlier this season.