In summer, hair generally grows faster than in winter. What's more, beards are exposed to more external aggressors (sun, salt, sand, etc.). So it is important to look after your beard more regularly in summer than in winter.
This means trimming more often (once or twice a week), rinsing daily and moisturising with beard oil. Deep cleansing with a 3-in-1 shower gel once or twice a week is also recommended.
Don't forget: a successful shave starts with good preparation. Take the time to moisturise your skin with a moisturising fluid before shaving, and use a quality razor with sharp blades.
Finally, after shaving, apply a soothing aftershave balm to moisturise your skin and prevent irritation.